Pressure, temp. transmiters & controllers » Wexon » PRESSURE TRANSMITTERS

PRESSURE TRANSMITTERS

At the very heart of Trafag pressure transmitters are pressure sensors based on either thin-film-on-steel or thick-film-on-ceramic technology derived from own in-house development and production. This ensures that the pressure sensors and associated electronics are perfectly attuned to one another, a feature subsequently successfully confirmed through reliable function and long serviceable life.

Trafag is a technology pioneer in the miniaturization of rugged pressure transmitters.

Product programme

The following information provides an initial programme overview. The individual product features are not freely combinable with one another. Further information can be obtained by consulting Trafag`s product catalogs and data sheets.

Thin-film-on-steel technology:

Measurement is effected according to the strain gauge principle. Through the force effect of the sample medium, the strain gauge bridge is deformed, changing its electrical characteristics.

• Very good long-term stability
• Ability to endure elevated medium temperatures
• Completely weld-sealed sensor system made of stainless steel without O-rings
• Very high resistance to overpressure; ideal for rated values up to 2000 bar

Thick-film-on-ceramic technology:

Measurement is effected according to the strain gauge principle. Through the force effect of the sample medium, the strain gauge bridge is deformed, changing its electrical characteristics.

Features:

• Resistant to aggressive media
• Ideal for low-pressure ranges
• Sealed with an O-ring

Piezo-resistive systems:

If a force is applied to a silicone crystal, this will change its specific electrical resistivity. In the piezo-resistive process, pressure is indirectly transferred to the silicone crystal via a diaphragm backfilled with silicone oil.

Features:

• Ideal for very low pressure ranges
• Large degree of freedom in arrangement of pressure connections (e.g. front-flush diaphragms)

Housings

The housings of Trafag pressure transmitters are all made of highly resistant stainless steel material.

Pressure measurement methods

• Absolute and gauge
• Single or differential pressure measurement

Pressure ranges (values given in bar)

Differential pressure measurements

• -1...1.5
• -1...5
• 0...1
• 0...2.5
• 0...6
• 0...10
• 0...16

Gauge pressure measurements

• -1...9
• -1...16
• 0...0.1
• 0...0.16
• 0...0.2
• 0...0.4
• 0...0.6
• 0...1
• 0...1.6
• 0...2.5
• 0...4
• 0...6
• 0...10
• 0...16
• 0...25
• 0...40
• 0...60
• 0...100
• 0...250
• 0...400
• 0...600
• 0...1000
• 0...1600
• 0...2000

Pressure connections

The connections are made of materials such as stainless steel or brass.

Examples of threaded connections:

Male threads:

• G1/4"
• G1/2"
• M10x1
• M14x1.5
• M18x1.5
• 7/16"-20UNF
• NPT 1/4
• Female threads:
• NPT 1/4
• G1/8"
• G1/4"
• M10x1
• M12x1.5

Diaphragm versions:

• Internal
• Frontal
• Front-flush

Signal outputs

• 4...20mA
• 0...10VDC
• 0...5VDC
• 1...6VDC
• 0.5...4.5VDC ratiometric
• RS485
• CANopen
• Relay
• Transistors

Switchpoint settings

For standard products, the switchpoint is set by the user. On request, Trafag carries out setting of the switchpoint in line with the specifications of the customer. In such a case, the devices can be supplied complete with calibration certificate upon request.

Electrical connections

• DIN43650A
• DIN43650C
• DIN72585
• M12
• Cable
• Alternative types of connection can also be manufactured.

Temperature ranges (°C):

Operating temperatures: -25....85/-25...125/-40....125
Media temperatures: -25...125/-40...125/-50...135/-25...200

IP protection ratings

• IP65
• IP67
• IP68

Special approvals

Various certifications such as Ex, Shipbuilding, Railways

Pressure peak pulsation dampers

All pressure connections with G1/4" outer thread are prepared for incorporation of a pressure peak pulsation damper.