Specifications

Recommended Voltage:                    2.0V  +/- 0.1V
Current Drawn:                                      145-160mA
Zero Offset:                                        0mV +/- 25mV
Sensitivity:                         8-14mV @ 10%LEL C₂H₂
Maximum Range:                                  0-100% LEL
Repeatability:

Daily:                                                             +/- 3%

Monthly:                                                        +/- 3%
Maximum Long Term Drift:
Span:                                         < +/- 1% LEL/Month
Zero:                                              <+/- ½ mV/Month
Response Time:                      T50: 3 sec  T90: 8 sec
Temperature Range:                          -20°C to +50°C
Temperature Drift: (-20°C to +70°C)
Zero:                                                       < +/-5%LEL
Humidity:                        0-100%RH, non-condensing
Linearity:                 effectively linear to 50%LEL C₂H₂

The Nemoto NP-AC is a catalytic (pellistor) type flammable gas sensor supplied as a matched pair of elements mounted on TO4 size headers and protected by a metal can. The sensor is specifically designed for the detection of Acetylene in air in the range 0-100% LEL.

Until now, the use of pellistors to monitor Acetylene levels has presented technical problems due to Acetylene’s ability to poison catalytic gas sensors, resulting in short sensor lifetimes in the field. The NP-AC pellistor, however, cannot be poisoned by Acetylene, and will operate reliably in this application. The NP-AC should not be used for any other purpose without first consulting N.E.T.

The device is compatible with a wide range of commercially available Gas Detection Systems and remote flammable gas detection heads.

Datasheet
(PDF)