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JUMO Wtrans Transmitter RTD Temperature Probe with Wireless Data Transmission

Type 902930, for mobile or stationary temperature measurement
Produktnummer: 902930

The Wtrans transmitter is used in connection with a Wtrans receiver for stationary or mobile detection of temperatures within the operating range of -30 to 260 °C or -200 to 600 °C. This measured temperature value is transmitted wirelessly to the receiver of the Wtrans measuring system, where it is displayed and available digitally at the RS485 interface as well as an analog output. One receiver variant can signal various alarms on two relay outputs.

The electronic transmission components of the RTD temperature probe are fitted in a vibration-proof design in the oilresistant and acid-proof case, the ambient temperature of which may either be from -30 to 85 °C or from -25 to 125 °C. The protection type is IP67. Only a durable lithium battery 3.6 V is used for voltage supply.

The radio frequencies of the Wtrans measuring system (868.4 MHz or 915 MHz) are largely impervious to external interferences and allow transmission even in a rough industrial environment. When using the antenna wall holder with the 3 m long antenna cable for the receiver, the open air range is 300 m.

The stainless steel protection tube with the Pt1000 temperature sensing element according to DIN EN 60751, class A in a 3-wire circuit is available with a flat, oblique, or centered probe tip. The insertion length is between 30 to 10000 mm. The variants are available with an extension tube or an M12 × 1 plug connection as an option to connect Pt1000 RTD temperature probes.

The Wtrans transmitter is also available as a version with ATEX approval (basic types 902930/15, .../17, .../55). These devices can be installed directly in explosive areas up to zone 0. The receiver is installed outside the Ex zone. The radio data transmission from the Ex area avoids costly installations with cable and protection barrier or supply isolators.

The design of the JUMO RTD temperature probes is to be agreed upon in the order. The Ex variant with M12 connector is always delivered with an approved JUMO RTD temperature probe with PTFE connection cable. Devices with process connections can be ordered in versions with Ex zone separation. A setup program is available as an accessory for easy configuration and parameterization of the Wtrans measuring system on the PC. The OnlineChart function can be used optionally to record the measured values on the PC.

For operating temperatures between -30 to +260 °C or -200 to +600 °C
For mobile or stationary temperature measurement
Open air range 300 m with interference-resistant transmission
No wiring work due to state-of-the-art wireless technology
Approval according to EC directive 94/9/EC (ATEX)
No wiring work due to state-of-the-art wireless technology
Fail-safe transmission through telegram coding