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Mini Gas Leak Detector
Model 21-070


The model 21-070 gas leak detector easily and quickly pinpoints gas leaks emitting from pressurized systems. Using a thermal conductivity detector with signal amplification, the instrument is zeroed in ambient air and responds to any gas mixture with a thermal conductivity different from that of air. The instrument is highly sensitive, having an intrinsically high signal to noise ratio with amplification that provides a maximum usable sensitivity.*

The model 21-070 can be operated with little or no training. Turn it on, zero, probe for leaks: its that simple. As the instrument probe passes over the leak, a sample is drawn into the conductivity cell. When a leak is discovered a signal is registered on the LED bar graph. No messy soap solution, so system contamination.


This leak detector in NOT designed to be used to determine leaks of combustible gases. It is designed to determine low level leaks of any gas having a different thermal conductivity than air. Utilizing this property it is, therefore, not specific to any gas or vapor. A combustible gas leak detector should be used for determination of combustible gas leaks in possible hazardous conditions.


Detector: thermal conductivity w/thermistors
Readout: LED bar graph with yellow and red segments
Line Voltage: 115 V, 60 Hz
Battery: Rechargeable NiCCd, 7.2 V/800 mAh
Battery Life: 3.5 hours; may be recharged to 95% in 1 hour
Dimensions: 3.25" W x 1.75" H x 5.25" L
Weight: Instrument 1.05 lbs.
  Charger 0.61 lbs.


Helium 1.0 x 10-5 cc/sec
Argon 1.0 x 10-4 cc/sec
C002 1.0 x 10-4 cc/sec
Refrigerant 1.0 x 10-4 cc/sec

How To Order

21-070 mini gas leak detector
59-050 carrying case