The Smallest, Lightest & Most Sensitive Leak Detector on the Market.

The LD239 is a compact handheld detector for portable detection of leak gases. The LD239 can accurately detect a wide variety of gases using a high-sensitivity thermal conductivity sensor and is especially useful for detecting Helium and Hydrogen tracer gas. Rapid awareness is possible with LD239's array of indicators including an LCD display, LED, and buzzer immediately alerting of any existing leaks.

• High-sensitivity thermal conductivity sensor
• Detected gases: helium, hydrogen, CO2, Ar, Ne, other non-corrosive gases
• Compact and lightweight design
• Rechargeable lithium-ion battery
• Multiple indicators: LCD display, LED, and buzzer

LD239 Helium Leak Detector

SKU: 2702-19340

Brand: GL Sciences

The LD239 Model is Now the LD249

The LD239 Helium Leak Detector has been upgraded to the new and improved LD249 model, offering enhanced features and better performance for a wide range of applications.

Discover the New LD249

Trusted by Leading Companies

Details

Portable & Handheld Helium Leak Detector

The Smallest, Lightest & Most Sensitive Leak Detector On The Market

The LD239 is the smallest, lightest, and most sensitive gas detector available, precisely engineered to detect helium gas with a sensitivity of up to 0.0005mL/min. With dimensions of just 11 x 5 x 2 cm and a weight of only 95g, the LD239 offers true pocket-size convenience combined with high-sensitivity gas detection.

High-Sensitivity Thermal Conductivity Sensor

The LD239 Gas Leak Detector senses gases by comparing the difference in thermal conductivity between sampled gas and ambient air. Any gas with sufficient difference in thermal conductivity to the ambient air can be detected.

Thermal conductivity of some common gases [(mW/m*K) at 0 deg C, 1 atm]

Gas	Thermal Conductivity	Gas	Thermal Conductivity	Gas	Thermal Conductivity
Hydrogen	168.2	Air*	24.1	Argon	16.3
Helium	142.2	Nitrogen*	24.0	Carbon	14.5
Neon	46.5	Ethane	18.0	Krypton	8.7
Methane	30.2	Ethylene	16.4	Xenon	5.2

*Undetectable

At only 11 x 5 x 2 cm and weighing 95g, the LD239 provides true pocketable high-sensitivity gas detection.

Be immediately alerted of gas leaks from several easy-to-read and user-friendly indicators including an LCD display, LED lights, and a buzzer.

Get up to 5 hrs. use from the built-in Lithium-ion battery and easily recharge anywhere using the micro-usb port.

Typical Applications

The LD239 Gas Leak Detector can be used in a variety of applications, including:

Piping, valves and manifolds
Automotive components
Gas chromatography systems

Refrigerators
Heating and Ventilation units

Air Conditioners
Safety

Trusted By Leading Companies

Specifications

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

Accessories

Item	Part#
LD239 Sample Filter	2702-19333
LD239 Reference Filter	2702-19334
LD239 Micro USB Battery Charging Cable	2702-19331

Applications

There are application notes for LD239 Helium Leak Detector.

Resources