Sensor-Technik is introducing the STW M01 thin-film pressure transmitter that is designed for use in the harsh conditions typically found in mobile hydraulic applications. Sensors are available for pressure ranges from 0-25 to 0-800bar, all with a robust all-stainless-steel construction designed to withstand severe levels of shock, vibration and electromagnetic interference. Despite these attributes, the M01 is a low-cost device that is suitable for high-volume applications; it is also available as an OEM version.
All sensors operate over a wide -40 to +125degC temperature range, and full temperature compensation is provided from 0 to 80degC, guaranteeing accuracy within 1.0 per cent of full scale. Even beyond the compensated range the sensor's output still has a maximum error of 2.5 per cent of full scale. This means that the M01 can be trusted to monitor hydraulic systems on vehicles that operate in true extremes of climate. All devices are amply protected against overpressure, with all but the largest devices withstanding twice their rated pressure.
Sensors are available with a choice of analogue outputs to cater for a variety of applications. Current outputs of 0-20mA and 4-20mA are available for two- and three-wire measurement techniques, and voltage outputs can be specified as 0-10, 0-5 or 0.5 to 4.5V. All types are short-circuit protected.
Connections
The M01 sensor also comes with a choice of three different types of electrical connector, plus cable output and three different choices of pressure connection, including G 1/4 and 1/4 NPT. Depending on these choices, the sensors exhibit ingress protection of either IP67 or IP69k.
M01 pressure sensors are manufactured in accordance with ISO/TS 16949 and comply with EN 69000-6-2 and EN 69000-6-3 for electromagnetic compatibility. Mechanical shock rating is 500 'g' per IEC 60068-2-27 and vibration rating is 20 'g' per IEC 60068-2-6 at resonant frequency.
The combination of low cost, rugged construction and reliable analogue output makes the M01 a good choice for high-volume applications both in off-highway vehicles and in general industrial applications.
Download a datasheet at www.sensor-technik.co.uk/datasheets/m01.pdf (900kB PDF).
