8
8. Specifications
Notice: The sensitivity should be dependent on the difference between the thermal
conductivities of gas and air (24.1(mW / m
㨯M
at 0 °C, 1atm); a large difference
results in a high sensitivity. Also, the kinds of gas and humidity should influence
the sensitivity.
Thermal conductivity of some common gases [(mW / m
㨯
k) at 0°C, 1atm]
● The lithium-ion battery inside the LD239 does not apply battery regulations in Russia or
Australia. Do not bring the LD239 these countries.
Leak Detector LD239 Instruction Manual (Cat.No.2702-19336)
Rev.1-1
Printed in Japan Copyright © 2012 GL Sciences Inc.
Detector:
Charging micro USB cable(1m), Instruction Manual,
LD239 Battery(built-in), Sample Filter(built-in), Reference Filter(built-in)
Power supply:
Display:
Thermal conductivity of gases:
Sensitivity:
Overall size:
Accessories:
Operating temperature range:
Net weight:
Parameter setting:
Thermistor-actuated thermal conductivity cell
He, CO
2
, Ar, Ne, etc. (not available under flammable or corrosive atmosphere)
Selectable from 2 ranges: Standard(Std.) Range and High(Hi.) Range
[Std Range] Helium 0.005mL/min in atmosphere
[Hi Range] Helium 0.0005mL/min in atmosphere
[Leakage display] LCD display(Max. 8 bar graphs), LED(Max. 8 lamps)
[Parameter setting display] LCD display
Range(Std./Hi.), Buzzer(ON/OFF), LED(ON/OFF), LCD backlight(ON/OFF),
Auto Power Off(ON/OFF)
Rechargeable battery-powered equipment(built-in dedicated lithium-ion battery)
[Charging time] Max. 2.5 hours
[Continuous operation] Approximately 5 hours (with new, fully charged batteries)
(Std. Range, Buzzer OFF, LED OFF, LCD Backlight OFF)
10 - 40 °C(non condensing)
50(W) × 19.5(D) × 111(H) mm (excluding projection)
Approximately 95g
Hydrogen *
Helium *
Neon *
Methane *
168.2
142.2
46.5
30.2
Air
Nitrogen
Ethane
Ethylene
24.1
24.0
18.0
16.4
Argon
Carbon dioxide
Krypton
Xenon
16.3
14.5
8.7
5.2
Gas
thermal
conductivity
Gas Gas
thermal
conductivity
thermal
conductivity
● Action for Environment (WEEE)
To users of GL Sciences equipment in the European Union:
The WEEE (Waste Electrical and Electronic Equipment) symbol on the product
indicates that it should be disposed of as agreed between the end user and the
distributor in a manner consistent with required WEEE Directives. It should not
be disposed of with general household waste.
: Gases which have higher thermal conductivity than air.
*
: Undetectable gases
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