The precision pressure transducers of this type are of a sturdy and compact construction. They are low-priced and can be supplied to operate in many measuring ranges. Because of their favourable technical data and a high degree of reliability they offer an interesting alternative to pressure measuring applications in all fields of machine construction, process engineering, aeronautics and astronautics.

The pressure transducers are easy to handle and immune to shock loads and vibrations as they are constructed without moving parts. They have a small dead volume. Their design makes them well suitable for both dynamic and static measuring performances, with the media being either liquid or gaseous. Measuring element and transducer housing ≥ 0 ... 50 bar are made of one piece of stainless steel. This guarantees absolute impermeability and insensitivity against aggressive media. For pressure transducers with ranges < 0 ... 20 bar critical media can cause damages in the area of the sensor body’s welding seams. In this case please contact us.

All pressure transducers without an internal amplifier have a standardized sensitivity of 1.0 mV/V. This enables the user to exchange i.e. the transducers in a measuring chain as he likes it and consequently the following electronic has not to be readjusted every time. Differential pressures can be measured with only one signal conditioner as well. Customized design is feasible upon request.

Description

The measuring element of the precision pressure transducer consists in a diaphragm. On its reverse side a strain gage rosette is applied, which is an assembly of 4 active resistance strain gages arranged in a bridge circuit. The pressure measurement is effected against atmosphere, that means the space behind the diaphragm is connected to the surrounding air pressure via a small outlet in the housing. The surrounding atmosphere has to be clean and dry. The medium to be measured is led via the pressure port onto the diaphragm.

As a result of pressure acting on the diaphragm it is deformed and consequently the resistance of the strain gages is changed. By applying a voltage to the strain gage bridge the resistance change is transformed into an output voltage which is directly proportional to the pressure.

Each transducer is available with an internal amplifier, a socalled pressure transmitter with a voltage or a current output.
The input of the internal amplifier is shielded against incorrect polarity and the output against voltage surge. The amplifier circuitry is constructed in a way that also low-prized power supply units can be used. The electrical connection is generated by a MJIL-specified housing plug. The pressure port is formed by an M 16 x 1.5 metric female thread with sealing ring slot, and with the help of adaptors, part of our product range, the pressure port can be changed.