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Best Combustible Gas Detectors for Home Inspectors: Defined Scope and Indications

Compare ET120, CD100A, CD200 and micro CD-100 for their documented combustible-gas roles. DRX3 is a broader application-specific comparison for qualified users.

5 picks · 1 full reviewUS-focusedResearch-based recommendations
Combustible Gas Leak Detector - ET120 | Klein Tools
Product image: Klein Tools. Check the listing for included accessories.

By TradeGear HQ editorial desk · Reviewed · Research methodology

Quick picks

Choose by the task. Read the detailed buying assessment and available full reviews before checking the retailer offer.

01
Combustible Gas Leak Detector - ET120 | Klein Tools
Dedicated combustible-gas comparisonKlein Tools ET120 Combustible Gas Leak Detector
Read full review →
02
CD100A - COMBUSTIBLE GAS LEAK DETECTOR | Kane USA
Read buying assessment ↓
03
CD200 - Quick Response Time Combustible Gas Leak Detector | Kane USA
Audible and visual tick-rate alternativeUEi Test Instruments CD200 Combustible Gas Leak Detector
Read buying assessment ↓
04
micro CD-100 Combustible Gas Detector | RIDGID Tools
Three-mode indication alternativeRIDGID micro CD-100 Combustible Gas Detector
Read buying assessment ↓
05
Fieldpiece DRX3 Refrigerant & Combustible Gas Leak Detector
Read buying assessment ↓

These are purchasing comparisons, not instructions to investigate an active gas emergency. A detector is not a personal safety alarm or a building gas-safety certificate.

HOW TO CHOOSE

What matters for the work

Identify the gas and intended role

Combustible-gas, refrigerant and carbon-monoxide detection are different applications. Confirm the exact supported gas and operating environment for the instrument.

Understand indications and maintenance

Sensor condition, clean-air setup and prescribed checks influence indications. A tick rate is not a universal laboratory concentration measurement.

Prepare the reporting and response scope

Record an appropriate observation without certifying an entire gas installation. Suspected hazardous conditions require the applicable emergency response rather than continued investigation.

We compared manufacturer specifications and documented features. We have not hands-on tested these products. Read our recommendation method →

Detailed picks

Useful differences, meaningful drawbacks and the specifications behind each recommendation.

OPTION 1
Combustible Gas Leak Detector - ET120 | Klein Tools
Product image: Klein Tools. Check the listing for included accessories.
Dedicated combustible-gas comparison
Dedicated combustible-gas comparison

Klein Tools

ET120 Combustible Gas Leak Detector

Best for: Inspectors whose agreed scope includes appropriate combustible-gas observations.

ET120 gives a flexible probe and two sensitivity settings for its documented combustible-gas role. Its indication belongs with the location and operating conditions, not an unsupported statement that all gas equipment is safe.

ET120 gives a flexible probe and two sensitivity settings for its documented combustible-gas role. Its indication belongs with the location and operating conditions, not an unsupported statement that all gas equipment is safe. Not personal protective equipment or a carbon-monoxide meter. Check the exact model, accessories and current instructions before purchase.

  • Role: Combustible gas
  • Probe: 18-inch flexible gooseneck
  • Indication: LED and audible
Role
Combustible gas
Probe
18-inch flexible gooseneck
Indication
LED and audible

Main tradeoff: Not personal protective equipment or a carbon-monoxide meter.

Manufacturer specification source ↗

Read Full ReviewCheck Price on AmazonBack to shortlist ↑
Check the exact model and kit in the listing.
OPTION 2
CD100A - COMBUSTIBLE GAS LEAK DETECTOR | Kane USA
Product image: UEi Test Instruments. Check the listing for included accessories.
Adjustable tick-rate alternative
Adjustable tick-rate alternative

UEi Test Instruments

CD100A Combustible Gas Leak Detector

Best for: Users comparing a flexible probe with an adjustable audible indication.

CD100A is the UEi alternative centered on a flexible probe and adjustable tick rate. Compare its sensor-care requirements and supported gases with the actual inspection scope.

CD100A is the UEi alternative centered on a flexible probe and adjustable tick rate. Compare its sensor-care requirements and supported gases with the actual inspection scope. A detector indication does not quantify every gas or replace an emergency response. Check the exact model, accessories and current instructions before purchase.

  • Role: Combustible gas
  • Gooseneck: 18 inches
  • Indication: Adjustable tick rate
Role
Combustible gas
Gooseneck
18 inches
Indication
Adjustable tick rate

Main tradeoff: A detector indication does not quantify every gas or replace an emergency response.

Manufacturer specification source ↗

Check Price on AmazonBack to shortlist ↑
Check the exact model and kit in the listing.
OPTION 3
CD200 - Quick Response Time Combustible Gas Leak Detector | Kane USA
Product image: UEi Test Instruments. Check the listing for included accessories.
Audible and visual tick-rate alternative
Audible and visual tick-rate alternative

UEi Test Instruments

CD200 Combustible Gas Leak Detector

Best for: Users who specifically want the documented CD200 indication arrangement.

CD200 adds a separate documented indication arrangement in the UEi range. Check the exact model and replacement sensor before treating similar-looking offers as interchangeable.

CD200 adds a separate documented indication arrangement in the UEi range. Check the exact model and replacement sensor before treating similar-looking offers as interchangeable. Confirm present seller stock and support; CD200 is a separate model from CD100A. Check the exact model, accessories and current instructions before purchase.

  • Role: Combustible gas
  • Gooseneck: 18 inches
  • Indication: Audible and visual tick rate
Role
Combustible gas
Gooseneck
18 inches
Indication
Audible and visual tick rate

Main tradeoff: Confirm present seller stock and support; CD200 is a separate model from CD100A.

Manufacturer specification source ↗

Check Price on AmazonBack to shortlist ↑
Check the exact model and kit in the listing.
OPTION 4
micro CD-100 Combustible Gas Detector | RIDGID Tools
Product image: RIDGID. Check the listing for included accessories.
Three-mode indication alternative
Three-mode indication alternative

RIDGID

micro CD-100 Combustible Gas Detector

Best for: Users comparing visual, audible and vibration indications.

micro CD-100 offers three indication modes, allowing a user to select a useful signal for the surroundings. Its clean-air setup and sensor condition remain part of interpreting an observation.

micro CD-100 offers three indication modes, allowing a user to select a useful signal for the surroundings. Its clean-air setup and sensor condition remain part of interpreting an observation. Calibrate and use according to the current instructions; it is not a building gas-safety certificate. Check the exact model, accessories and current instructions before purchase.

  • Role: Combustible gas
  • Indication: Visual / audible / vibration
  • Format: Flexible probe
Role
Combustible gas
Indication
Visual / audible / vibration
Format
Flexible probe

Main tradeoff: Calibrate and use according to the current instructions; it is not a building gas-safety certificate.

Manufacturer specification source ↗

Check Price on AmazonBack to shortlist ↑
Check the exact model and kit in the listing.
OPTION 5
Fieldpiece DRX3 Refrigerant & Combustible Gas Leak Detector
Product image: Fieldpiece. Check the listing for included accessories.
Broader documented gas support
Broader documented gas support

Fieldpiece

DRX3 Refrigerant & Combustible Gas Leak Detector

Best for: Qualified users with an agreed need for the documented broader gas applications.

DRX3 is the broader refrigerant-and-combustible-gas comparison. Choose it only when both documented applications are relevant to the work, rather than buying a service instrument for an ordinary visual inspection.

DRX3 is an application-specific upgrade. Check the exact supported gases and permitted environment, and keep service diagnosis outside the ordinary inspection scope.

  • Sensor: Heated diode
  • Scope: Refrigerant and combustible gas
  • Compatibility: Manufacturer lists A1 / A2L / A3
Sensor
Heated diode
Scope
Refrigerant and combustible gas
Compatibility
Manufacturer lists A1 / A2L / A3

Main tradeoff: Its hazardous-location approvals and gas support do not transfer to DR58 or DR82.

Manufacturer specification source ↗

Check Price on AmazonBack to shortlist ↑
Check the exact model and kit in the listing.
BUYING QUESTIONS

Before you choose

Is a refrigerant detector automatically a gas detector?

No. Confirm the exact supported gases and permitted application.

Does no indication prove there are no leaks?

No. Access, operating conditions and instrument limitations affect what can be observed.