UEi CD100A Combustible Gas Leak Detector Review

Quick answer

The UEi CD100A is a handheld combustible-gas sniffer with an 18-inch flexible gooseneck probe, built for pinpointing where a gas leak is actually coming from rather than continuously monitoring a room. That makes it a fundamentally different tool from the fixed, plug-in alarms reviewed elsewhere on this site: it's for a specific "find the leak" moment, not for ongoing background detection. Its own official datasheet states no certification claim at all -- a documented absence, not an unchecked one.

What it does

Per UEi's official datasheet, the CD100A uses a solid-state semiconductor sensor at the tip of an 18-inch flexible gooseneck probe, letting a user sweep the probe along a suspected leak point -- a pipe joint, an appliance connection, a fitting -- to locate the source. This is a materially different job from a fixed alarm: it's a diagnostic tool you pick up and use when you already suspect a leak near a specific location, not a device that sits on a wall and alerts you to a leak anywhere in the room.

Key specifications

According to UEi's official datasheet for this model:

• Sensor: Solid-state semiconductor
• Probe: 18-inch flexible gooseneck
• Sensitivity: 50 ppm
• Gases detected: Methane, butane, natural gas, gasoline/petrol vapor, propane, hydrogen sulfide, toluene
• Power: 9V alkaline battery, manufacturer-rated for approximately 5 hours of typical use
• Dimensions: 8" x 4" x 1.5"; weight approximately 15 oz
• Warranty: 1-year limited

What we like

• A genuinely different tool for a genuinely different job. Every other gas/CO product reviewed on this site is a fixed, continuously-monitoring alarm; this is a portable, point-and-check instrument, useful for someone who already suspects a leak near a specific appliance or fitting and wants to confirm exactly where.
• Honestly documented, including the honest gaps. UEi's two-page datasheet states a specific sensitivity figure and a broad, named list of detectable gases, without padding the spec sheet with vague marketing claims.
• From an established test-instruments brand, not an unfamiliar name -- UEi/Kane USA is a professional instruments manufacturer, not a generic import listing.

Limitations

• No certification claim of any kind. See "Safety and certification" below -- this is the most important thing to know before buying this specific device.
• Not a substitute for a fixed alarm. This device only detects gas where you physically point the probe, at the moment you're using it -- it provides no ongoing, unattended monitoring the way the plug-in alarms elsewhere on this site do.
• Short battery runtime (about 5 hours per the manufacturer), by design -- reasonable for occasional diagnostic use, not meant to run continuously.

Who should choose it

• Someone who already suspects a leak near a specific pipe, joint, or appliance connection and wants a tool to pinpoint it.
• Someone who wants a portable check tool in addition to, not instead of, a fixed household alarm.

Who should skip it

• Anyone looking for continuous, unattended gas monitoring -- see the fixed plug-in alarms reviewed elsewhere on this site instead.
• Anyone who specifically needs a certified device for a context requiring one -- see "Safety and certification" below.

Safety and certification

What UEi states: the official two-page datasheet for this model states a sensitivity specification (50 ppm) and a one-year limited warranty, and lists the specific gases it detects. It does not state a UL, CSA, or any other certification or safety-standard claim anywhere on the datasheet.

What that means: this is a documented absence, not an unstated or overlooked one -- we looked specifically on the official datasheet and found no certification claim of any kind to report, positive or negative. There is simply no certification claim here for this site to independently confirm either way.

Sources

• UEi Test Instruments' official CD100A datasheet (manufacturer, PDF) -- supports: sensor type, probe length, sensitivity, detectable gases, power source and runtime, dimensions, weight, warranty, and the documented absence of any certification claim.
• Amazon's product listing for this ASIN -- identity/availability context only, not used for any specification or safety claim; the affiliate link below is generated automatically, not hand-typed.

No customer review text, star rating, or Amazon-listing safety claim was used as a source for any statement in this review.

About this review

Silent Home Hazards has not tested this device firsthand -- we have not used this probe to locate a real leak or measured its sensitivity ourselves. Every specification and claim above is drawn from UEi's own published datasheet, cited above, and is written as a sourced claim rather than a first-hand finding.