5
WIKA Operating instructions/Betriebsanleitung, WU-2X
11553678.05 EN/DE 02/2019
3. Signs and symbols / 4. Function
2-wire
Two connection lines are intended for the voltage supply.
The supply current is the measurement signal.
3-wire
Two connection lines are intended for the voltage supply.
One connection line is intended for the measurement signal.
U+
Positive supply connection
U-
Negative supply connection
S+
Positive measurement connection
4. Function
Ultra High Purity Transducer
WU-20: Single End
WU-25: Flow Through
WU-26: Modular Surface Mount
Function:
The pressure prevailing within the application is transformed into a standardised electrical signal
through the deflection of the diaphragm, which acts on the sensor element with the power supply fed to the
transducer. This electric signal changes in proportion to the pressure and can be evaluated correspondingly
For transducer with Ex-marking ATEX
European guideline for explosion
protection. The product complies with
the requirements for the European
directive 2014/34/EU on explosion
protection
V DC direct voltage
EN
For transducer with FM (Factory
Mutual) marking:
The product was tested and certified
by FM Approvals. It complies with the
applicable US-American standards
on safety (including explosion protec-
tion).
