Features
􀁺􀁺 Explosion proof housing and sensor design
􀁺􀁺 H2 specific solid state sensor for 0 - 2000 ppm
􀁺􀁺 H2 specific catalytic sensor for 0 - 100%LEL
􀁺􀁺 Molecular sieve filter built in; highly specific to H2
􀁺􀁺 Eliminates false alarms from IPA and other gases
􀁺􀁺 4-20 mA transmitter, 24VDC
Applications
􀁺􀁺 Semiconductor
􀁺􀁺 Power Plants
􀁺􀁺 Fuel Cell Industry
􀁺􀁺 R & D applications
􀁺􀁺 Gas plants

 

RKI offers unique proprietary sensor technologies for hydrogen specific detection in either the % LEL or PPM
ranges. By utilizing a proprietary molecular sieve coating that is built into both our catalytic or solid state
sensors, false alarms from typical hydrocarbon interfering gases are essentially eliminated.
For the LEL range, a special catalytic sensor is coated with a molecular sieve that eliminates the response to
common background gases like IPA, methane, gasoline, etc. while providing a detection range of 0 – 100% LEL
for hydrogen.
The hydrogen PPM sensor can reliably detect leaks 20 times smaller than a standard catalytic sensor. This solid
state sensor has a molecular sieve coating on the sensing element, which filters out interference from other
gases and provides a 0 – 2,000 PPM range. Both the LEL and PPM range sensors are available with 24 VDC
transmitters with linear 4-20 mA outputs.

 

 

Part #
Sets transmitter output to 20 mA with 2000
ppm Hydrogen output from sensor
H2 Specific LEL
65-2450RK
H2 Specific ppm
65-2440RK
Min Operating Voltage 11 VDC
Max Operating Voltage 30 VDC
Max Current Draw 200 mA (power wires)
25 mA (signal wires) 3 wires
Signal Output
100 mA (power wires)
25 mA (signal wires) 3 wires
4 mA at 0% LEL
20 mA at 100% LEL
Linear Output
4 mA @ 0 ppm
20 mA @ 2000 ppm
Linear Output
Operating Environment
Location Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D.
Temperature -40 to 180° F 15 to 110° F
Humidity
Housing Enclosure: Aluminum Explosion Proof Sensor: Stainless steel and aluminum
Sensor
Type Catalytic combustion with molecular sieve
Life Expectancy
Sensor Current
Controls
Factory set and sealed
Zero Sets transmitter output to 4 mA with 0% LEL
output from combustible sensor
Sets transmitter output to 4 mA with
0 ppm output from sensor
Sets transmitter output to 20 mA with 100%
Span LEL output from combustible sensor
Tools Needed
Over 3 years typical Over 5 years typical
5-95% RH non-condensing
Response Time 20 Seconds to 90% concentration
Metal oxide semiconductor with
molecular sieve
Calibration kit, Screwdriver, and voltmeter used to make adjustments.
20 Seconds to 90% concentration
Warranty One year on electronics and sensors.
Detection Range 0 - 100% LEL 0 - 2000 ppm
Calibration Frequency 6 Months 12 Months

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定货号	产品名称	规格配置 / 简介	市场价/(会员价)
TA-01223-00	S-Series LEL Hydrogen (H2) specific sensor		/()

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