Headerless pressure sensor is reliable in harsh environments

Target applications include medical instruments, process control and pressure transmitters, as well as measurement in fresh water, wastewater and for partial vacuum gas. RV and industrial tank level systems also benefit from the small-profile, rugged sensor.

A ceramic substrate attached to the package includes laser-trimmed resistors, which provide temperature compensation and offset correction. An additional laser-trimmed resistor can be used to adjust an external differential amplifier and provide span interchangeability to within ±1%.

The sensor features a wide compensated temperature range of -20°C up to +85°C and an extended operating temperature of -40°C to +105°C. It is available in both gauge and absolute with standard pressure ranges from 0-15 to 0-100psi and from 0-1 to 0-28bar, respectively.

Typical span is 100mV, with a minimum of 75 and a maximum of 150mV and a ±1% interchangeable span when the gain set resistor is used to adjust an external differential amplifier.

Encased in a rugged 316L stainless steel housing, this media-compatible piezoresistive silicon pressure sensor provides exceptional accuracy and stability in the most demanding measurement environments. Silicon oil transfers the pressure from the stainless steel diaphragm to the sensing element. The die is mounted in reverse, without the use of a header, contributing to the sensor's low cost.

Pressure non-linearity is ±0.3% span and pressure hysteresis is ±0.2% span. The use of solid-state circuitry increases the sensor's reliability and the unit offers a response time of 0.1ms.

Pricing and delivery is dependent upon quantity ordered.