A temperature transmitter is a device that connects to a temperature sensor to transmit the signal elsewhere for monitoring and control purposes. Typically, the temperature sensor is either an RTD(PT100 or PT1000), thermistor or thermocouple type sensor and will interface with a PLC, DCS, data logger or display hardware. The temperature transmitter's role is to isolate the temperature signal, filter any EMC noise, amplify and convert the temperature sensor's signal to a 4-20mA or 0-10V DC range for further use.
Classified by the force direction, load cells can be divided into the following types:
Piezoresistive pressure sensor diffusion silicon pressure sensor.
The piezoresistive sensor has become a commonly used pressure sensor thanks to the widespread use of MEMS manufacturing technologies.
Physical separation from hazardous media:
Fluid-isolation barrier can be implemented to prevent corrosive media coming into direct contact with the sensor diaphragm;
Heat is dissipated from the media in the tube.
Pressure sensors for use with corrosive media often feature housings made from stainless steel or plastics such as PVDF, PVC or PPS.
TM Sensor use a stainless steel diaphragm backed by silicon oil that transfers pressure to the sensing element.
Tips show how a Milli voltage-output pressure sensor, Voltage-output pressure transducer or Current-output pressure transmitter be connected to a programmable logic controller (PLC) or meter to monitor pressure in a typical industrial equipment or process control application.
The main advantages of piezoelectric sensors are robustness and low power.
The sensing elements are made of rigid materials, which can be natural crystals such as quartz or specially formulated ceramics. These require only a very small deformation to generate an output, so there are effectively no moving parts.
The capacitive element is mechanically simple and robust.
Capacitive sensors are able to operate over a wide temperature range and are very tolerant of short-term overpressure conditions.
They can be used to measure a wide range of pressure from vacuum (2.5 mbar or 250 Pa) to high pressures up to around 10,000 psi (70 MPa). They’re ideal for both lower-pressure applications and reasonably harsh environments.
Advantages and disadvantages of Piezoresistive strain gauge sensors Piezoresistive strain gauge sensorsThese are the earliest and most widely used type of pressure sensor.The simple construction means low cost and durability. The sensors are robust with good resistance to shock, vibration, and dynamic pressure changes.
Industrial pressure sensors also referred to as pressure transducers, pressure transmitters, pressure indicators and pressure switches, normally have a diaphragm type design that uses strain gauges, which are either bonded to or diffused into it, with the strain gauges acting as resistive elements.