Crowcon Electrochemical sensors typically have a stated shelf life of six months from manufacture, provided they’re stored in ideal conditions at 20˚C. Inevitably, a small proportion of this period is taken up during the manufacture of the gas detector and in shipping to the customer.

We advise that when acquiring sensors and any spare parts during its lifetime, you plan and time your purchases for a minimal delay between storage and usage.

Lifespan when in use? In absolutely ideal conditions – stable temperature and humidity in the region of 20˚C and 60%RH with no incidence of contaminants – electrochemical sensors have been known to operate over 4000 days (11 years)! Frequent exposure to the target gas doesn’t limit the life of these tiny fuel cells: high-quality sensors have a large amount of catalyst material and robust conductors which don’t become depleted by the reaction.

However, ideal conditions don’t always exist or stay that way, so it’s vital to err on the side of caution when it comes to gas sensors.

With that in mind, electrochemical sensors for common gases (for example carbon monoxide or hydrogen sulphide) have a typical operational life of 2-3 years. A more exotic gas sensor, such as hydrogen fluoride, may have only 12-18 months.

Part Number	Gas / Sensor Type	Range / Details
E01976	Ammonia	0-100 ppm (Sensoric; -40°C min temp)
E01957	Ammonia	0-100 ppm (Sensoric SE; -20°C min)
E01967	Ammonia	0-1000 ppm (Sensoric SE; -20°C min)
E011050	Carbon Monoxide	CO-BF Sensor
E01987	Chlorine Dioxide	0-1 ppm (Sensoric)
E01686	Chlorine	Sensoric
E01231	Chlorine	7CLH Sensor
E01587	Ethylene Oxide	7BETO Sensor
E01234	Hydrogen Chloride	7BHL Sensor
E01616	Hydrogen Chloride	Sensoric
E01237	Hydrogen Cyanide	7HCN Sensor
E01617	Hydrogen Cyanide	Sensoric
E01687	Hydrogen Fluoride	Sensoric
E01236	Hydrogen	0-2000 ppm (7HYT)
E01899	Hydrogen	0-100% LEL (H2 3E 4)
E01229	Hydrogen Sulphide	0-1000 ppm (7H)
E01446	Hydrogen Sulphide	0-50 ppm (7HH)
E011034	Hydrogen Sulphide	0-50 ppm (H2S-BH)
E011035	Hydrogen Sulphide	0-200 ppm (H2S-B1)
E01233	Nitric Oxide	7BNT Sensor
E011030	Nitric Oxide	3NT(G) with pins
E01230	Nitrogen Dioxide	7NDH Sensor
E01488/A	Oxygen	7OX Sensor
E01503	Ozone	7OZ Sensor
E01620	Ozone	O3 3E 1 Sensor
E01917	Phosgene	Sensoric
E01585	Phosphine	7PH Sensor
E01383	Sulphur Dioxide	7SH Sensor
E01232	Sulphur Dioxide	7ST/F Sensor
E01586	Volatile Organics	7BVO Sensor

Note: Above sensors come with pins unless otherwise stated.