Stainless steel pressure sensors in thick film technology - now also with integrated process connection

Metallux: For many applications, it is recommended to replace conventional ceramic pressure sensors with stainless steel pressure sensors. The piezoresistive pressure sensors, which are made from stainless steel in a monolithic design, excel with high burst pressure even under high pressure ranges.

Over the years, Metallux has expanded the series of stainless steel, thick film pressure sensors by a version with an enhanced output signal, 0.5...4.5V (ratio metric). In addition to the stainless steel monolithic SPS 1000 sensors, the SPS 3003 series of Metallux offers an integrated connection thread. Thanks to this connection thread, welding the sensor to a pressure connection is no longer required. The pressure sensor is made of one piece. This allows an extremely high burst pressure. Safety in the application is increased, making leaking media a thing of the past. A calibration process (patent pending) ensures precision and long term stability. These sensors are suitable for various applications such as refrigeration technology, hydraulics, automation, and in plant and machine construction.

Stainless steel thick film pressure sensor SPS 1000
Diameter: 18 x 6.35 mm
Supply: 3 - 30 V
Output signal: 1.5 - 3.5 mV/V
Pressure range p-nom: 10 - 1000 bar
Overload: 3 x p-nom
Burst pressure: 10 x p-nom
Pressure type: relative
Temperature range: -40 - 85°C, optional up to 125°C

Stainless steel thick film pressure sensor SPS 1000 Z
Diameter: 18 mm x max. 12 mm
Supply: 5 V
Output signal: 0.5 - 4.5 mV/V (ratio metric)
Pressure range p-nom: 10 - 1000 bar
Overload: 3 x p-nom
Burst pressure: 10 x p-nom
Pressure type: relative
Temperature range: -40 - 85°C, optional up to 125°C

Electrical connections for SPS 1000 and SPS 1000 Z: Solder pads, flex cable and solder pins.

Stainless steel thick film pressure sensor SPS 3003
Diameter: Spanner size 22, G1/4” connection thread total height 24 mm
Supply: 3 - 30 V
Output signal: 1.5 - 3.5 mV/V
Pressure range p-nom: 10 - 1000 bar
Overload: 3 x p-nom
Burst pressure: 10 x p-nom
Pressure type: relative
Temperature range: -40 - 85°C, optional up to 125°C

Electrical connections for SPS 3003 and SPS 3003 Z: Solder pads, flex cable and solder pins.

Process connection G1/4” (other connection threads are also available on request), no seal required - higher burst pressure in high areas of pressure.

Stainless steel thick film pressure sensor SPS 3003 Z
Diameter: spanner size 22, G1/4” connection thread total height 30 mm
Supply: 5 V
Output signal: 0.5 - 4.5 mV/V (ratio metric)
Pressure range p-nom: 10 - 1000 bar
Overload: 3 x p-nom
Burst pressure: 10 x p-nom
Pressure type: relative
Temperature range: -40 - 85°C, optional up to 125°C

Electrical connections for SPS 3003 and SPS 3003 Z: Solder pads, flex cable and solder pins.

Process connection G1/4” (other connection threads are also available on request), no seal required - higher burst pressure in high areas of pressure Casing connection: Screw thread, welded joint, flanging.

Why stainless steel sensors?

A major disadvantage of ceramics is their lack of ductility and high level of brittleness. If they are overloaded, ceramic membranes burst and the measure medium leaks. In contrast, stainless steel sensor initially only undergo plastic deformation. Stainless steel sensors can be connected by welding technology or even by an integrated pressure connection, as compared to using an elastomer seal. The omission of seals is very beneficial for use in hydraulics or refrigeration technology. In summary, users benefit from the following: A high level of security for workers and equipment due to the high burst pressure, as the medium stays in the system. The steel sensor with integrated pressure connection enables easier fitting. A high level of long-term stability results in reliable signal detection. All of these factors lead to a high level of reliability with a simultaneous reduction in costs.