JUMO 902050 Screw-In RTD Temperature Probe with Connection Line, Pt100/Pt1000

A cable-connected screw-in RTD probe for liquids and gases

The JUMO 902050 is a screw-in RTD temperature probe with a permanently attached connection line, used to measure temperature in liquid and gaseous media in dry and humid rooms. JUMO lists apparatus engineering, meat product plants and slaughterhouses, heating, ventilation and air conditioning, industrial furnaces and heating systems, and refrigeration among its areas of application. The probe is available as a single or double RTD, seals reliably under vacuum and overpressure, and can be supplied SIL- and PL-qualified through extra codes.

Four basic types cover the mechanical designs: 902050/10 with fixed screw connection, 902050/20 with loose screw connection, 902050/30 with loose screw connection and a reduced protection tube (5.4 mm reduced to 3.3 mm), and 902050/40 with a threaded protection tube. The connection line is strain-relieved and offered in PVC, silicone, PTFE or metal braiding insulation, with optional bend protection by spring or tubing.

Technical specifications

Reading the 902050 order code

The order code runs: basic type – operating temperature – measuring insert – tolerance class – protection tube diameter – insertion length – process connection – line end – line length / extra codes. The example in the datasheet is 902050/10-378-1001-1-6-100-104-11-2500/000, which describes a fixed G 1/2 screw-in probe with a silicone line, one Pt100 in 3-wire circuit, class B, 6 mm tube, 100 mm insertion and a 2.5 m line with ferrules. Measuring insert code 1003 is 1 x Pt100 2-wire, 1001 is 3-wire, 1011 is 4-wire, 1005 is Pt1000 2-wire, and 2003, 2001 and 2005 are the double versions.

Stock versions are listed with part numbers, for example 902050/10-378-1001-1-6-100-104-11-2500/316 (00065232), 902050/10-402-1003-1-6-50-104-11-2500/315,317 (30072369) and 902050/40-388-1001-1-8-25-111-11-2500/315,317 (00055732). Screw-in and welding protective sleeves belong to data sheet 909710.

Choosing the line material, tube length and protection

Select the connection line by the ambient temperature at the cable, not by the process temperature: PVC tolerates -5 to +80 degC, silicone -50 to +180 degC, PTFE -50 to +260 degC and metal braiding -50 to +400 degC. The reduced protection tube of type /30 is meant for small installation spaces, and the threaded tube of type /40 screws directly into an M8 hole. The SIL and PL extra codes apply only in connection with the named JUMO evaluation devices and not with other transmitters; extra codes 1150 to 1152 require tolerance class A or AA and 4-wire technology.

Insertion length should immerse the sensing portion well into the medium to limit stem conduction errors. Because the probe seals reliably in the event of vacuum and overpressure and has no terminal head to leak, it works on refrigeration lines, HVAC circuits, process skids, ovens and food equipment. Extra code 061 (UL) cannot be combined with the M12 plug connector.

Response and accuracy information helps to compare variants. In water at 0.2 m/s the 6 mm probe reaches half of a step change in about 2 s and 90 percent in about 6 s. Class A and AA tolerances are only available in 3-wire or 4-wire circuit, while class B is standard for 2-wire. Protection tube diameters of 5, 5.4 (reduced to 3.3) and 6 mm are available in stainless steel or Inconel, and the connection line is strain-relieved. Extra code 1160 provides an H2 ready version for mobile hydrogen applications.

Documents and quotation

The JUMO data sheet 902050 (V1.00, 2026-07-20) is attached below. Seven Star LLC supplies JUMO probes from Muscat; give us the full order code or the insertion length, thread, line material and line length and we will quote. More temperature sensors are listed under https://omansevenstar.com/product-category/sensors-transmitters/temperature/.