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LD239 Helium Leak Detector

SKU: 2702-19340
The smallest, lightest & most sensitive Leak Detector on the market.

GL Sciences’ Gas Leak Detector LD239 adapts thermal conductivity technique between target gases and referential gas.

Being the smallest, lightest and the most sensitive on the market, the LD239 detects up to 0.0005mL/min of helium gas. With the USB port, the LD239 can be recharged easily anywhere.


• Super compact & light weight (only 95g)
• Easy to use
• Highly sensitive
• Rechargeable USB port
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LD239 Helium Leak Detector SKU: 2702-19340


LD239 Helium Leak Detector

Gas leaks can cause detector noise and baseline instability, shorten column life and waste expensive carrier gas. Liquid leak detectors, although inexpensive, can contaminate your GC system. GL Sciences' LD239 leak detector, introduced in 2012 (and replacing it's predecessor, the LD229) is an easy way to quickly identify leaks in your system - check your valves, fittings, and traps for leaks after every maintenance, and after thermal cycling as these can loosen some types of fittings.

LD239 provides the most sensitive He leak detection available in an inexpensive, compact, easily chared (via USB), and easy to use configuration.



Detection Method Thermal conductivity
Target Gases Helium, CO2, Ar, Ne etc (gases that are largely different from referential gas)
※Not for flammable and corrosive gases
Sensitivity (He) [Standard range] 0.005mL/min at minimum [High range] 0.0005mL/min at minimum
Display LCD
Temperature Range 10 - 40 ℃
Battery Lithium ion battery installed, rechargeable through a USB port, 2.5 hours for a full recharge. 5 hour battery life with continuous use
Dimension 50 (W) x 20 (D) x 111 (H) mm
Weights 95g
Accessories USB cable (1M), Sample gas filter (probe built-in), referential gas filter (built-in), instruction manual, warranty certificate


Spare Parts

Description Qty Cat. No
LD239 Battery 1 pc 2702-19341
LD239 Sample Filter 1 pc 2702-19333
LD239 Reference Filter 1 pc 2702-19334
LD239 Charging micro USB cable 1 pc 2702-19331



There are application notes for LD239 Helium Leak Detector.


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LD239 Helium Leak Detector