np-17shm

Our SHM/SHP Pellistor, or catalytic bead sensor, line is selected by N.E.T. and manufactured, on OEM basis, by the companies leading in the field. The sensor monitors the presence of a combustible gas or vapor in air (or atmospheres containing oxygen) up to the Lower Explosive Limit (LEL).

SHM/SHP Pellistors consist of a matched pair of elements mounted on a single header and protected by a metal mesh filter. Both types have a standard 4-series enclosure (D20.4 mm x H100) to fit a standard gas detector. SHM housing is of stainless steel, while SHP’s is of plastic. The standard dimensions and the electrical output make our Pellistor perfectly compatible with a wide range of commercially available Gas Detection Systems and remote flammable gas detector heads.

SHM/SHP Pellistors exhibits excellent long term zero and sensitivity stability and a high level of resistance to catalytic poisons. The highly automated manufacturing procedure employed results in a repeatable, reliable sensor which, unlike similar devices, requires no trimming resistor to enable the detector to be matched with a compensator.


Detectable gases – Catalytic Pellistors:
Hydrogen (H2)Ammonia (NH3)
Methane (CH4)Acetylene (C2H2)
List of hydrocarbons and other gases detectable through cross factors:
Acetic acidAcetone
Cyclo-hexaneCyclo-pentane
EthanolEthyl acetate
EthyleneHydrogen
Iso-butaneIso-octane
Iso-propanolMethanol
N-butaneN-heptane
N-hexaneN-pentane
StyreneToluene
AmmoniaPropylene
Carbon monoxideXylene
n-octane