Instrumentation specialist Impress Sensors & Systems Ltd has launched a new oil-free stainless steel welded pressure sensor for oxygen applications, where silicon oils or elastomeric seals cannot be used. The sensors offer high overpressures (typically three times the nominal pressure rating) and so are also suitable for mobile hydraulics and machine engineering, where pressure spikes or peaks are present.

The new DMP335 has no O-ring seals, which means the sensor is easier to keep clean and sanitise for medical applications. The sensors are completely de-greased before despatch to the customer.

Sam Drury, Sales & Marketing Director at Impress Sensors & Systems comments: “Oxygen is present in many process manufacturing environments, medical applications, as well as filling and bottling plants. The oxygen needs to be transported safely through these processes without coming into contact with oil or other contaminated fluids, which could cause an explosion. The all-stainless steel, oil-free design of the DMP335 pressure sensor makes it ideal for these types of environments.”

The sensors are ATEX-certified (intrinsically-safe) for hazardous gas and dust environments (Zone 0 and Zone 20). Nominal pressures are available from 0… 6 bar up to 0… 600 bar. Permissible temperatures are from –40 deg C to +125 deg C. Output signal is either 2-wire: 4 to 20mA, or 3-wire: 0 to 10V.

A version of the sensor is also available with 4-digit LED display and 1, 2 or 4 PNP contacts. The digital display is configurable and can be rotated through 180 degrees.