Description
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.
Specifications
| Part # | H2 Specific LEL
65-2450RK | H2 Specific ppm
65-2440RK |
| Detection Range | 0 – 100% LEL | 0 – 2000 ppm |
Min Operating
Voltage | 11 VDC |
Max Operating
Voltage | 30 VDC |
Max Current
Draw | 200 mA (power wires)
25 mA (signal wires) 3 wires | 100 mA (power wires)
25 mA (signal wires) 3 wires |
| Signal Output | 4 mA at 0% LEL
20 mA at 100% LEL
Linear Output | 4 mA @ 0 ppm
20 mA @ 2000 ppm
Linear Output |
Response
Time | 20 Seconds to 90% concentration | 20 Seconds to 90% concentration |
| 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 | 5-95% RH non-condensing |
| Housing | Enclosure: Aluminum Explosion Proof
Sensor: Stainless steel and aluminum |
| Sensor |
| Type | Catalytic combustion
with molecular sieve | Metal oxide semiconductor
with molecular sieve |
| Life Expectancy | Over 3 years typical | Over 5 years typical |
| Controls |
| Sensor Current | 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 |
| Span | Sets transmitter output to 20 mA
with 100% LEL output from
combustible sensor | Sets transmitter output to 20 mA
with 2000 ppm Hydrogen output
from sensor |
| Tools Needed | Calibration kit, Screwdriver, and voltmeter used to make adjustments. |
| Calibration Frequency | 6 Months | 12 Months |
| Warranty | One year |
Specifications subject to change without notice.
Made in the USA
