JUMO VIBROtemp 902040 Vibration-Resistant Screw-In RTD Probe with Plug Connector

A vibration-resistant screw-in Pt100 for engines, compressors and vehicles

The JUMO VIBROtemp (type 902040) is a screw-in RTD temperature probe with a plug connector for measuring temperature reliably under vibration. JUMO lists commercial vehicles, construction and agricultural machinery, motors, compressors and railway technology as its application areas. The vibration-resistant construction gives excellent long-term stability in tough operating conditions, and the protection tube is stepped down to 4 mm to keep response times short: in water at 0.4 m/s the datasheet gives t0.5 of 1.2 s and t0.9 of 6 s.

Four basic types differ in the connector: 902040/10 with an AMP plug connector (Junior Power Timer, IP67), 902040/12 with an M12 x 1 machine connector (IP67), 902040/15 with a bayonet connector to DIN 72585 (IP69/IP69K) and 902040/17 with a Bosch compact connector 1.1 (IP69/IP69K). The measuring insert is a Pt100 to DIN EN 60751:2009 / IEC 60751:2008, class B, in 2-wire circuit; Pt500, Pt1000, PTC or NTC elements are possible on request.

Technical specifications

Selecting the VIBROtemp connector, element and material

Order code: basic type – operating temperature – measuring insert – tolerance class – tube diameter – insertion length – process connection – tube material / extra code. The example in the datasheet is 902040/10 – 387 – 1003 – 1 – 7.5 – 29 – 121 – 20 / 000. Select the connector first, because it fixes the protection rating: choose 902040/15 or /17 where high-pressure washdown (IP69K) is expected, and /10 or /12 where IP67 is enough. The M12 version is the one that JUMO pairs with its dTRANS T09 cable transmitter for 4 to 20 mA or IO-Link output.

A mating coupling is needed for each connector type and is listed in data sheet 909760. Special versions with other lengths, wall thickness, thread types or extension tubes can be made to order.

Installation, sealing and where vibration matters

Screw the probe into an M14 x 1.5 port using the hex on the body, then lock the coupling; the datasheet states that the connectors are locked to ensure contact. The IP67/IP69 ratings apply only when the coupling is plugged in. Brass tubes cost less and suit oil, coolant and air circuits, whereas stainless steel suits more aggressive media. The wall of the 4 mm tip limits mechanical strength, so check the pressure and flow loading of the application.

Typical points of measurement are engine coolant and oil, compressor discharge, hydraulic tanks, gearboxes, generator sets and rail traction equipment, which are common on mobile plant and standby power in the Gulf. A Pt100 element gives a standard resistance signal to a controller input or transmitter; for SIL applications use extra code 658 with the named JUMO safety temperature limiter or monitor. Choose the 2-wire circuit only when the cable run is short, or correct the lead resistance in the instrument.

Many details of the housing support the vibration claim. The tube is stepped from 7.5 mm to 4 mm over an insertion length of 29 mm, which keeps mass low at the tip, and the process thread is M14 x 1.5 with a thread undercut that can be modified in special versions. Customer-specific features include insertion length, wall thickness, thread type, material and an extension tube. The connector types accept mating couplings from data sheet 909760. For the SIL and PL option, JUMO states compatibility with the safety temperature limiter and monitor of the 70115X series only.

Documents and quotation

The JUMO data sheet 902040 is attached for download. Seven Star LLC supplies JUMO probes from Muscat; give us the connector type, temperature code, element, tube material and insertion length so we can quote. Other probes are listed under https://omansevenstar.com/product-category/sensors-transmitters/temperature/.