Serviceline Industrial Sensors
Serviceline Explosion Protection

Sensor tester ST 03

ST 03
  • Two LEDs (NPN/PNP) for displaying the switching state
  • Suitable for ultrasonic sensors due to output current of 100 mA
  • Usable for 2-, 3- an 4-wire sensors in NPN- and PNP-technique as well as for NAMUR sensors

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH, also apply to Pepperl+Fuchs AG.

Download the complete datasheet as a PDF:


Datasheet excerpt: Technical data of  ST 03

Product Description
Sensor tester
Electrical specifications
Operating voltage18 V, two 9 V block batteries included with delivery
Current loading capacityload current max. 100 mA
Mechanical specifications
Connection3 connection terminals
for 0 V, 18 V and signal input
Dimensions131 mm x 65 mm x 27 mm
NoteNAMUR sensors are not tested in accordance with EN 60079-11

Approvals+Certificates: ST 03

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-4069PDF218 KB

Function: ST 03

The sensor tester is suitable for function testing of all 2-, 3- and 4- wire PNP and NPN DC sensors and for testing NAMUR sensors.

Power is supplied to the sensor via the 0 V and 18 V clamp. For 3- and 4-wire sensors, the signal line is also applied to the third terminal.

When the sensor output switches, this is displayed by an LED and indicated as well by a buzzing tone.

Because of the high output load capacity of max. 100 mA, ultrasonic sensors or similar devices can also be connected.

The automatic On/Off function prevents unnecessary use of energy and makes operation simple.