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Best Combustible Gas Detector With Sniffer Probe of July 2026

Extech EZ40 EzFlex Combustible Gas Detector leads 20 combustible gas detectors at 97/100, 12 points ahead of Reed Instruments R9300 Combustible Gas Leak Detector. Its strongest scored lines are detects methane (Yes, 100/100) and detects propane (Yes, 100/100). The weakest high-weight line is detects methane at 100/100 (Yes). CPS LS790B Combustible Gas Leak Detector is #3 at 85/100, leaving a 12-point spread across the top 3.

Updated July 1, 2026 from published manufacturer specs · Scored by the RenoRanked methodology · Editorial standards

SPEC LEDGER#1

Extech EZ40 EzFlex Combustible Gas Detector

Combustible Gas Detectors

Detects MethaneYes

Detects PropaneYes

Detects CombustibleYes

Probe IncludedYes

RenoRanked97/100

9 specs · 1 source

Full scorecard ->

Detects Methane18%

Detects Propane16%

Detects Combustible14%

Probe Included13%

Sensitivity Ppm12%

Alarm11%

Response Time Sec9%

Power Source7%

Scored from published specs · method

Quick picks

Where should you start?

#1Best Overall97/100
Extech EZ40 EzFlex Combustible Gas Detector
Weak spot: power source (60/100)
Scorecard
#2#2 Overall85/100
Reed Instruments R9300 Combustible Gas Leak Detector
Weak spot: sensitivity ppm (1/100)
Scorecard
#3#3 Overall85/100
CPS LS790B Combustible Gas Leak Detector
Weak spot: sensitivity ppm (1/100)
Scorecard
#4#4 Overall85/100
TPI 725 Combustible Gas Leak Detector
Weak spot: sensitivity ppm (1/100)
Scorecard

How to choose

How do the weights fit your use?

Weight order beats rank order here: detects methane, then detects propane, then detects combustible. Apply the detects methane or detects propane filter only when it represents a real constraint. For near-ties, open the row detail and compare missing or neutral-scored detects combustible fields.

Use-case comparison

Combustible Gas Detectors Use-Case Checks Before the Table

For combustible gas detectors, read detects methane (18%) beside detects propane (16%) before treating rank as settled. Close detects methane scores need detail rows. Checked July 1, 2026; empty detects methane source cells are left blank. The point is to slow down combustible gas detectors decisions that look obvious only because one product is listed first. Read the lower-scoring detects propane dimensions, then compare the source-backed cells that created the detects methane gap. If the published detects methane fields are missing or neutral, the combustible gas detectors table keeps that uncertainty visible instead of converting it into an unsupported recommendation.

All 20 combustible gas detectors, ranked

The visible combustible gas detectors columns focus on detects methane, detects propane, and detects combustible; unchanged detects propane fields move into each combustible gas detectors row drawer.

RenoRanked charts 8 scored dimensions across all 20 combustible gas detectors. Among the combustible gas detectors, sensitivity ppm shows the widest spread in the full catalog range.

Showing all 20 scored products.

20 combustible gas detectors appear in the 2026 score table, using published manufacturer and retailer spec tables; marketing claims are not scored unless the source hierarchy backs the field and with sensitivity ppm, response time sec, display type beside each score.
Product					Best fit / trade-off	Action
Top scoreExtech EZ40 EzFlex Combustible Gas Detector	97/100	5,000	2	Indicator Lights	Best With Detects MethaneTrade-off: Power Source 60/100	Full scorecard
Reed Instruments R9300 Combustible Gas Leak Detector	85/100	50	2	Lcd	Best for LcdTrade-off: Sensitivity Ppm 1/100	Full scorecard
CPS LS790B Combustible Gas Leak Detector	85/100	50	2	LED	Best for LedTrade-off: Sensitivity Ppm 1/100	Full scorecard
TPI 725 Combustible Gas Leak Detector	85/100	40	2	LED	Trade-off: Sensitivity Ppm 1/100	Full scorecard
Amprobe GSD600 Gas Leak Detector	85/100	40	2	LED	Trade-off: Sensitivity Ppm 1/100	Full scorecard
TopTes PT520A Gas Leak Detector	85/100	50	2	Lcd	Trade-off: Sensitivity Ppm 1/100	Full scorecard
UEi Test Instruments CD100A	85/100	50	2	Indicator Lights	Trade-off: Sensitivity Ppm 1/100	Full scorecard
Bacharach Informant 2 Dual-Purpose Leak Detector	85/100	50	2	LED	Trade-off: Sensitivity Ppm 1/100
RIDGID micro CD-100 Combustible Gas Detector	85/100	40	2	Indicator Lights	Trade-off: Sensitivity Ppm 1/100
General Tools Combustible Gas Leak Detector	85/100	50	5	Indicator Lights	Trade-off: Sensitivity Ppm 1/100
Klein Tools Combustible Gas Leak Detector	85/100	50	2	Indicator Lights	Trade-off: Sensitivity Ppm 1/100
Klein Tools Combustible Gas Leak Detector with Pouch	85/100	50	2	Indicator Lights	Trade-off: Sensitivity Ppm 1/100
INFICON GAS-Mate Combustible Gas Leak Detector	85/100	5	1	LED	Trade-off: Sensitivity Ppm 0/100
TopTes PT199 Natural Gas Detector	72/100	50	2	Lcd	Trade-off: Probe Included 0/100
Kidde Plug-In Carbon Monoxide and Explosive Gas	70/100	2,500	60	Digital	Best Plug In SetupTrade-off: Probe Included 0/100
First Alert GCO1CN	70/100	2,500	60	Digital	Trade-off: Probe Included 0/100
testo 316-1 Gas Leak Detector	58/100	100	5	Indicator Lights	Trade-off: Detects Propane 0/100
General Tools Natural Gas Detector Pen	56/100	50	5	LED	Trade-off: Detects Propane 0/100
Forensics Detectors Natural Gas Leak Detector	52/100	50	30	Lcd	Trade-off: Detects Propane 0/100
Forensics Detectors Propane Gas Leak Detector	50/100	50	30	Lcd	Trade-off: Detects Methane 0/100

#1
Rank #1Extech EZ40 EzFlex Combustible Gas Detector
97/100
Sensitivity Ppm
5,000
Response Time Sec
2
Display Type
Indicator Lights
Best With Detects Methane
Trade-off: Power Source 60/100
Full scorecard
#2
Reed Instruments R9300 Combustible Gas Leak Detector
85/100
Sensitivity Ppm
50
Response Time Sec
2
Display Type
Lcd
Best for Lcd
Trade-off: Sensitivity Ppm 1/100
Full scorecard
#3
CPS LS790B Combustible Gas Leak Detector
85/100
Sensitivity Ppm
50
Response Time Sec
2
Display Type
LED
Best for Led
Trade-off: Sensitivity Ppm 1/100
Full scorecard
#4
TPI 725 Combustible Gas Leak Detector
85/100
Sensitivity Ppm
40
Response Time Sec
2
Display Type
LED
Trade-off: Sensitivity Ppm 1/100
Full scorecard
#5
Amprobe GSD600 Gas Leak Detector
85/100
Sensitivity Ppm
40
Response Time Sec
2
Display Type
LED
Trade-off: Sensitivity Ppm 1/100
Full scorecard
#6
TopTes PT520A Gas Leak Detector
85/100
Sensitivity Ppm
50
Response Time Sec
2
Display Type
Lcd
Trade-off: Sensitivity Ppm 1/100
Full scorecard
#7
UEi Test Instruments CD100A
85/100
Sensitivity Ppm
50
Response Time Sec
2
Display Type
Indicator Lights
Trade-off: Sensitivity Ppm 1/100
Full scorecard
#8
Bacharach Informant 2 Dual-Purpose Leak Detector
85/100
Sensitivity Ppm
50
Response Time Sec
2
Display Type
LED
Trade-off: Sensitivity Ppm 1/100
#9
RIDGID micro CD-100 Combustible Gas Detector
85/100
Sensitivity Ppm
40
Response Time Sec
2
Display Type
Indicator Lights
Trade-off: Sensitivity Ppm 1/100
#10
General Tools Combustible Gas Leak Detector
85/100
Sensitivity Ppm
50
Response Time Sec
5
Display Type
Indicator Lights
Trade-off: Sensitivity Ppm 1/100
#11
Klein Tools Combustible Gas Leak Detector
85/100
Sensitivity Ppm
50
Response Time Sec
2
Display Type
Indicator Lights
Trade-off: Sensitivity Ppm 1/100
#12
Klein Tools Combustible Gas Leak Detector with Pouch
85/100
Sensitivity Ppm
50
Response Time Sec
2
Display Type
Indicator Lights
Trade-off: Sensitivity Ppm 1/100
#13
INFICON GAS-Mate Combustible Gas Leak Detector
85/100
Sensitivity Ppm
5
Response Time Sec
1
Display Type
LED
Trade-off: Sensitivity Ppm 0/100
#14
TopTes PT199 Natural Gas Detector
72/100
Sensitivity Ppm
50
Response Time Sec
2
Display Type
Lcd
Trade-off: Probe Included 0/100
#15
Kidde Plug-In Carbon Monoxide and Explosive Gas
70/100
Sensitivity Ppm
2,500
Response Time Sec
60
Display Type
Digital
Best Plug In Setup
Trade-off: Probe Included 0/100
#16
First Alert GCO1CN
70/100
Sensitivity Ppm
2,500
Response Time Sec
60
Display Type
Digital
Trade-off: Probe Included 0/100
#17
testo 316-1 Gas Leak Detector
58/100
Sensitivity Ppm
100
Response Time Sec
5
Display Type
Indicator Lights
Trade-off: Detects Propane 0/100
#18
General Tools Natural Gas Detector Pen
56/100
Sensitivity Ppm
50
Response Time Sec
5
Display Type
LED
Trade-off: Detects Propane 0/100
#19
Forensics Detectors Natural Gas Leak Detector
52/100
Sensitivity Ppm
50
Response Time Sec
30
Display Type
Lcd
Trade-off: Detects Propane 0/100
#20
Forensics Detectors Propane Gas Leak Detector
50/100
Sensitivity Ppm
50
Response Time Sec
30
Display Type
Lcd
Trade-off: Detects Methane 0/100

Tie-break rules settle close combustible gas detectors scores within 2 points; keep sensitivity ppm and response time sec beside the rank before calling it a clean win.

All 20 scored products are included in the table.

Source fields checked on July 1, 2026. This combustible gas detectors table keeps sensitivity ppm, response time sec, and display type beside the score; price and availability entries stay omitted unless a source provides them. No product is a perfect match; low scores mark the closest match only when a row misses a scored dimension.

Product Finder

Combustible Gas Detector Finder

The shopper enters target gases, sensor probe, and sensitivity. The finder scores each of the compared combustible gas detectors on published specs - led by detects methane, detects propane, and detects combustible - and ranks them, explaining in plain language why the top pick fits the shopper's stated needs. not first-hand tested; every ranking datum traces to a published product spec.

Every score sits on a 0-100 scale built from published specifications, with combustible gas detectors: detects methane and detects propane leading the visible weights.

Detects Methane

Insist on detects methane.

Detects Propane

Makes detects propane mandatory.

Detects Combustible

Drops rows lacking detects combustible.

More matching details6 more

Probe Included

Makes probe included mandatory.

Sensitivity Ppm50

Your sensitivity ppm cutoff.

Alarm85 dB

Sets the alarm floor.

Response Time Sec2

Sets the response time sec floor.

Power Source

Reranks by power source.

Display Type

Set the display type.

FILTER THE TABLE

Set combustible gas detectors preferences around detects methane to narrow the ranking below. Until then, every scored row stays visible in the default order.

RenoRanked maps 20 combustible gas detectors by sensitivity ppm and alarm. Top plotted score: 97/100 on the alarm axis.

How does each pick stack up?

#1 Extech EZ40 EzFlex Combustible Gas Detector97/100Detects Methane 18 pts, Detects Propane 16 pts, Detects Combustible 14 pts
#2 Reed Instruments R9300 Combustible Gas Leak Detector85/100Detects Methane 18 pts, Detects Propane 16 pts, Detects Combustible 14 pts
#3 CPS LS790B Combustible Gas Leak Detector85/100Detects Methane 18 pts, Detects Propane 16 pts, Detects Combustible 14 pts
#4 TPI 725 Combustible Gas Leak Detector85/100Detects Methane 18 pts, Detects Propane 16 pts, Detects Combustible 14 pts
#5 Amprobe GSD600 Gas Leak Detector85/100Detects Methane 18 pts, Detects Propane 16 pts, Detects Combustible 14 pts

5 products with score contribution by dimension
Product	Composite	Detects Methane	Detects Propane	Detects Combustible	Probe Included	Sensitivity Ppm	Alarm	Response Time Sec	Power Source
Extech EZ40 EzFlex Combustible Gas Detector	97/100	18 points from grade 1	16 points from grade 1	14 points from grade 1	13 points from grade 1	12 points from grade 1	11 points from grade 1	8.8 points from grade 0.98	4.2 points from grade 0.6
Reed Instruments R9300 Combustible Gas Leak Detector	85/100	18 points from grade 1	16 points from grade 1	14 points from grade 1	13 points from grade 1	0.1 points from grade 0.01	11 points from grade 1	8.8 points from grade 0.98	4.2 points from grade 0.6
CPS LS790B Combustible Gas Leak Detector	85/100	18 points from grade 1	16 points from grade 1	14 points from grade 1	13 points from grade 1	0.1 points from grade 0.01	11 points from grade 1	8.8 points from grade 0.98	4.2 points from grade 0.6
TPI 725 Combustible Gas Leak Detector	85/100	18 points from grade 1	16 points from grade 1	14 points from grade 1	13 points from grade 1	0.1 points from grade 0.01	11 points from grade 1	8.8 points from grade 0.98	4.2 points from grade 0.6
Amprobe GSD600 Gas Leak Detector	85/100	18 points from grade 1	16 points from grade 1	14 points from grade 1	13 points from grade 1	0.1 points from grade 0.01	11 points from grade 1	8.8 points from grade 0.98	4.2 points from grade 0.6

The top five combustible gas detectors are separated by 12 points; sensitivity ppm is the tiebreaker.

Best Overall

Extech EZ40 EzFlex Combustible Gas Detector

97/100

RenoRankedhow it’s scored

Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 5,000

Showing all 8 scored dimensions

Detects Methane100

Detects Propane100

Detects Combustible100

Probe Included100

Sensitivity Ppm100

Alarm100

Response Time Sec98

Power Source60

Why it ranks here

Extech EZ40 EzFlex Combustible Gas Detector pulls ahead on sensitivity PPM: 100/100, past Reed Instruments R9300 Combustible Gas Leak Detector at 1/100. Extech EZ40 EzFlex Combustible Gas Detector lands on the highest listed alarm mark for this set: 85 dB. Extech EZ40 EzFlex Combustible Gas Detector shows a 60/100 soft spot on power source.

Detects Methane: A detects-methane listing for Extech EZ40 EzFlex Combustible Gas Detector reaches the top grade on this line; one reason Extech EZ40 EzFlex Combustible Gas Detector stands out for published detects methane that matters for comparing products in this niche.
Detects Propane: A detects-propane listing for Extech EZ40 EzFlex Combustible Gas Detector takes full credit for this dimension; a visible edge for Extech EZ40 EzFlex Combustible Gas Detector for published detects propane that matters for comparing products in this niche.
Detects Combustible: A detects-combustible listing for Extech EZ40 EzFlex Combustible Gas Detector hits the ceiling for this scored input; useful support for buyers comparing Extech EZ40 EzFlex Combustible Gas Detector for published detects combustible that matters for comparing products in this niche.

Check before you buy

Every scored dimension for Extech EZ40 EzFlex Combustible Gas Detector lands high; the closest thing to a low mark is power source at 60/100, so decide on fit.

Details ▾

Display model: EZ40
Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 5,000
Alarm: 85 dB
Response Time Sec: 2
Power Source: Battery
Display Type: Indicator Lights
Last verified: 2026-07-01

Compare all 20 ↑Specs checked July 1, 2026

#2 Overall

Reed Instruments R9300 Combustible Gas Leak Detector

85/100

RenoRankedhow it’s scored

Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 50

Showing all 8 scored dimensions

Detects Methane100

Detects Propane100

Detects Combustible100

Probe Included100

Sensitivity Ppm1

Alarm100

Response Time Sec98

Power Source60

Why it ranks here

Reed Instruments R9300 Combustible Gas Leak Detector slips on sensitivity PPM, 1/100 next to Extech EZ40 EzFlex Combustible Gas Detector's 100/100. It is tied for the highest listed alarm in this set at 85 dB. It scores 60/100 on power source.

Reed Instruments R9300 Combustible Gas Leak Detector and CPS LS790B Combustible Gas Leak Detector finish with the same total score; compare detects methane and detects propane before choosing between them.

Detects Methane: A detects-methane listing for Reed Instruments R9300 Combustible Gas Leak Detector takes full credit for this dimension; a visible edge for Reed Instruments R9300 Combustible Gas Leak Detector for published detects methane that matters for comparing products in this niche.
Detects Propane: A detects-propane listing for Reed Instruments R9300 Combustible Gas Leak Detector hits the ceiling for this scored input; useful support for buyers comparing Reed Instruments R9300 Combustible Gas Leak Detector for published detects propane that matters for comparing products in this niche.
Detects Combustible: A detects-combustible listing for Reed Instruments R9300 Combustible Gas Leak Detector lands at the top of this score lane; helping Reed Instruments R9300 Combustible Gas Leak Detector reach 85/100 for published detects combustible that matters for comparing products in this niche.

Check before you buy

For the R9300 Combustible Gas Leak Detector, the published record is weakest on sensitivity ppm at 50 (1/100), the line to weigh before buying.
Reed Instruments R9300 Combustible Gas Leak Detector is not at its best on sensitivity ppm, where a listed sensitivity PPM of 50 scores 1/100.

Details ▾

Display model: R9300
Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 50
Alarm: 85 dB
Response Time Sec: 2
Power Source: Battery
Display Type: Lcd
Last verified: 2026-07-01

Compare all 20 ↑Specs checked July 1, 2026

#3 Overall

CPS LS790B Combustible Gas Leak Detector

85/100

RenoRankedhow it’s scored

Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 50

Showing all 8 scored dimensions

Detects Methane100

Detects Propane100

Detects Combustible100

Probe Included100

Sensitivity Ppm1

Alarm100

Response Time Sec98

Power Source60

Why it ranks here

CPS LS790B Combustible Gas Leak Detector, at 1/100, gives ground on sensitivity PPM. CPS LS790B Combustible Gas Leak Detector matches the set's highest listed alarm at 85 dB. It is easiest to justify on detects methane, where it scores 100/100.

CPS LS790B Combustible Gas Leak Detector stays close to Reed Instruments R9300 Combustible Gas Leak Detector on total score, so detects methane then detects propane is the first place to look for a practical difference.

Detects Methane: A detects-methane listing for CPS LS790B Combustible Gas Leak Detector hits the ceiling for this scored input; useful support for buyers comparing CPS LS790B Combustible Gas Leak Detector for published detects methane that matters for comparing products in this niche.
Detects Propane: A detects-propane listing for CPS LS790B Combustible Gas Leak Detector lands at the top of this score lane; helping CPS LS790B Combustible Gas Leak Detector reach 85/100 for published detects propane that matters for comparing products in this niche.
Detects Combustible: A detects-combustible listing for CPS LS790B Combustible Gas Leak Detector reaches the ceiling for this dimension; one reason CPS LS790B Combustible Gas Leak Detector stands out for published detects combustible that matters for comparing products in this niche.

Check before you buy

For the LS790B Combustible Gas Leak Detector, the published record is weakest on sensitivity ppm at 50 (1/100), the line to weigh before buying.
CPS LS790B Combustible Gas Leak Detector loses ground on sensitivity ppm: a listed sensitivity PPM of 50 sits at 1/100.

Details ▾

Display model: LS790B
Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 50
Alarm: 85 dB
Response Time Sec: 2
Power Source: Battery
Display Type: LED
Last verified: 2026-07-01

Compare all 20 ↑Specs checked July 1, 2026

#4 Overall

TPI 725 Combustible Gas Leak Detector

85/100

RenoRankedhow it’s scored

Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 40

Showing all 8 scored dimensions

Detects Methane100

Detects Propane100

Detects Combustible100

Probe Included100

Sensitivity Ppm1

Alarm100

Response Time Sec98

Power Source60

Why it ranks here

TPI 725 Combustible Gas Leak Detector makes the most sense for its 100/100 on made for buyers who put. At 85 dB, TPI 725 Combustible Gas Leak Detector shares the set's highest listed alarm. TPI 725 Combustible Gas Leak Detector lands at 1/100 where sensitivity PPM is weighed.

On detects methane, the shortlist barely separates TPI 725 Combustible Gas Leak Detector from CPS LS790B Combustible Gas Leak Detector; weigh detects methane against detects propane for your own use before treating TPI 725 Combustible Gas Leak Detector as clearly better.

Detects Methane: A detects-methane listing for TPI 725 Combustible Gas Leak Detector lands at the top of this score lane; helping TPI 725 Combustible Gas Leak Detector reach 85/100 for published detects methane that matters for comparing products in this niche.
Detects Propane: A detects-propane listing for TPI 725 Combustible Gas Leak Detector reaches the ceiling for this dimension; one reason TPI 725 Combustible Gas Leak Detector stands out for published detects propane that matters for comparing products in this niche.
Detects Combustible: A detects-combustible listing for TPI 725 Combustible Gas Leak Detector reaches the top grade on this line; a visible edge for TPI 725 Combustible Gas Leak Detector for published detects combustible that matters for comparing products in this niche.

Check before you buy

TPI 725 Combustible Gas Leak Detector needs scrutiny here because a listed sensitivity PPM of 40 lands its sensitivity ppm at 1/100.

Details ▾

Display model: 725
Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 40
Alarm: 85 dB
Response Time Sec: 2
Power Source: Battery
Display Type: LED
Last verified: 2026-07-01

Compare all 20 ↑Specs checked July 1, 2026

#5 Overall

Amprobe GSD600 Gas Leak Detector

85/100

RenoRankedhow it’s scored

Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 40

Showing all 8 scored dimensions

Detects Methane100

Detects Propane100

Detects Combustible100

Probe Included100

Sensitivity Ppm1

Alarm100

Response Time Sec98

Power Source60

Why it ranks here

Amprobe GSD600 Gas Leak Detector sits level with the set's highest listed alarm at 85 dB. It is one to double-check on sensitivity PPM, at 1/100. It earns its best mark on detects methane, scoring 100/100.

Amprobe GSD600 Gas Leak Detector is essentially in the same detects methane tier as TPI 725 Combustible Gas Leak Detector; detects propane matters more here than the list order.

Detects Methane: A detects-methane listing for Amprobe GSD600 Gas Leak Detector reaches the ceiling for this dimension; one reason Amprobe GSD600 Gas Leak Detector stands out for published detects methane that matters for comparing products in this niche.
Detects Propane: A detects-propane listing for Amprobe GSD600 Gas Leak Detector reaches the top grade on this line; a visible edge for Amprobe GSD600 Gas Leak Detector for published detects propane that matters for comparing products in this niche.
Detects Combustible: A detects-combustible listing for Amprobe GSD600 Gas Leak Detector takes full credit for this dimension; useful support for buyers comparing Amprobe GSD600 Gas Leak Detector for published detects combustible that matters for comparing products in this niche.

Check before you buy

The scorecard's low mark falls on sensitivity ppm (40).
Amprobe GSD600 Gas Leak Detector shows a listed sensitivity PPM of 40 as its 1/100 soft mark for published sensitivity ppm that matters for comparing products in this niche.

Details ▾

Display model: GSD600
Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 40
Alarm: 85 dB
Response Time Sec: 2
Power Source: Battery
Display Type: LED
Last verified: 2026-07-01

Compare all 20 ↑Specs checked July 1, 2026

#6 Overall

TopTes PT520A Gas Leak Detector

85/100

RenoRankedhow it’s scored

Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 50

Showing all 8 scored dimensions

Detects Methane100

Detects Propane100

Detects Combustible100

Probe Included100

Sensitivity Ppm1

Alarm100

Response Time Sec98

Power Source60

Why it ranks here

A listed 85 dB ties TopTes PT520A Gas Leak Detector for the highest listed alarm here. On detects methane, TopTes PT520A Gas Leak Detector reaches its top line at 100/100. sensitivity PPM is where TopTes PT520A Gas Leak Detector slips, to 1/100.

TopTes PT520A Gas Leak Detector and Amprobe GSD600 Gas Leak Detector finish with the same total score; compare detects methane and detects propane before choosing between them.

Detects Methane: A detects-methane listing for TopTes PT520A Gas Leak Detector reaches the top grade on this line; a visible edge for TopTes PT520A Gas Leak Detector for published detects methane that matters for comparing products in this niche.
Detects Propane: A detects-propane listing for TopTes PT520A Gas Leak Detector takes full credit for this dimension; useful support for buyers comparing TopTes PT520A Gas Leak Detector for published detects propane that matters for comparing products in this niche.
Detects Combustible: A detects-combustible listing for TopTes PT520A Gas Leak Detector hits the ceiling for this scored input; helping TopTes PT520A Gas Leak Detector reach 85/100 for published detects combustible that matters for comparing products in this niche.

Check before you buy

Its lowest-scoring line in the listing is sensitivity ppm (50).
TopTes PT520A Gas Leak Detector needs scrutiny here because a listed sensitivity PPM of 50 lands its sensitivity ppm at 1/100.

Details ▾

Display model: PT520A
Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 50
Alarm: 85 dB
Response Time Sec: 2
Power Source: Battery
Display Type: Lcd
Last verified: 2026-07-01

Compare all 20 ↑Specs checked July 1, 2026

#7 Overall

UEi Test Instruments CD100A

85/100

RenoRankedhow it’s scored

Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 50

Showing all 8 scored dimensions

Detects Methane100

Detects Propane100

Detects Combustible100

Probe Included100

Sensitivity Ppm1

Alarm100

Response Time Sec98

Power Source60

Why it ranks here

UEi Test Instruments CD100A equals the highest listed alarm in this lineup at 85 dB. UEi Test Instruments CD100A shows a 1/100 soft spot on sensitivity PPM. UEi Test Instruments CD100A leads its own scorecard on detects methane, a 100/100 result.

UEi Test Instruments CD100A stays close to TopTes PT520A Gas Leak Detector on total score, so detects methane then detects propane is the first place to look for a practical difference.

Detects Methane: A detects-methane listing for UEi Test Instruments CD100A takes full credit for this dimension; useful support for buyers comparing UEi Test Instruments CD100A for published detects methane that matters for comparing products in this niche.
Detects Propane: A detects-propane listing for UEi Test Instruments CD100A hits the ceiling for this scored input; helping UEi Test Instruments CD100A reach 85/100 for published detects propane that matters for comparing products in this niche.
Detects Combustible: A detects-combustible listing for UEi Test Instruments CD100A lands at the top of this score lane; one reason UEi Test Instruments CD100A stands out for published detects combustible that matters for comparing products in this niche.

Check before you buy

UEi Test Instruments CD100A gives buyers weighing published sensitivity ppm that matters for comparing products in this niche a 1/100 to weigh on sensitivity ppm.

Details ▾

Display model: CD100A
Detects Methane: Yes
Detects Propane: Yes
Detects Combustible: Yes
Probe Included: Yes
Sensitivity Ppm: 50
Alarm: 85 dB
Response Time Sec: 2
Power Source: Battery
Display Type: Indicator Lights
Last verified: 2026-07-01

Compare all 20 ↑Specs checked July 1, 2026

How this ranking is scored

Each product in this table gets one 0–100 score computed from manufacturer sheets, retailer listings, and dated source records: the same weighted formula for all 20 combustible gas detectors, applied to 8 recorded fields per product. The four heaviest dimensions and their exact share of the total are shown here; the full weight table, source ledger, and score-band definitions live on the methodology page.

RenoRanked does not conduct first-hand product tests. Scores synthesize published manufacturer and retailer records only, and every figure traces to a dated source. Marketing claims and retailer copy are excluded unless a published specification supports them.

Full methodology →

Heaviest scoring dimensions
Detects Methane	18%	The detects methane score is binary: a listed yes earns full marks, while a no or a missing listing earns zero.
Detects Propane	16%	The detects propane score is binary: a listed yes earns full marks, while a no or a missing listing earns zero.
Detects Combustible	14%	The detects combustible score is binary: a listed yes earns full marks, while a no or a missing listing earns zero.
Probe Included	13%	This dimension checks whether probe included is listed; yes earns full credit, while no or missing earns zero.

Score bands80+ strong60–79 solidBelow 60 limited fit

Retrieved 2026-07-01 to 2026-07-02 · Built 2026-07-09

Testo2026-07-02Source record
Amprobe2026-07-01Source record
Bacharach2026-07-01Source record
General Tools2026-07-01Source record
Klein Tools2026-07-01Source record

RenoRanked source ledger tracks combustible gas detectors with 9 retrieval records, retrieved 2026-07-01 to 2026-07-02.

Update history

July 1, 2026Rankings rebuilt from the refreshed catalog: 20 combustible gas detectors re-scored on 8 published spec fields, detects methane first.

Common buying questions

What is the best combustible gas detector?

The leading combustible gas detector on detects methane is Extech EZ40 EzFlex Combustible Gas Detector, 97/100 — but power source at 60/100 is the visible trade-off.

How should I compare close alternatives?

Two combustible gas detectors separated by a couple of points are close alternatives in practice. Open both products' scorecards and compare detects methane to split them, not their positions in the full comparison table. Ranking order for combustible gas detectors follows the published weight table, not editorial preference.

Are these combustible gas detector rankings based on physical testing?

Source review, not a field test. Published detects methane specs and visible detects propane weights, plus the refresh date, carry the combustible ga detectors ranking order. A missing spec never sinks a combustible ga detectors; unlisted values score neutral under the published rules.