The TM4591 is a compact IFM Pt 100 Class A temperature sensor designed for accurate temperature measurement with minimal insertion depth. Its 20 mm installation length is useful for compact process installations. The G 1/2 external thread with sealing cone provides secure process mounting. The sensor provides a passive RTD signal for external evaluation and control. Stainless-steel construction, electropolished wetted surfaces and IP68/IP69K protection support demanding process applications. IFM specifies a 20 mm installation length, 160 bar pressure capability and 1/3 second T05/T09 response for this model.
Explore performance details, construction highlights, applications, and technical information in one clear overview.
The TM4591 uses a compact cylindrical stainless-steel construction. Its short 20 mm sensing length is suitable where installation space is restricted. The 6 mm probe diameter allows installation into compatible process fittings. Electropolished wetted stainless-steel surfaces support hygienic process applications. The M12 connector uses gold-plated contacts.
The Pt 100 Class A element provides reliable resistance-based temperature measurement. The -40...150 °C range supports a broad range of industrial processes. The short probe provides a compact thermal measurement point. Its dynamic response is approximately 1/3 seconds for T05/T09. External electronics are required to evaluate the RTD signal.
The G 1/2 external thread provides secure process connection. Its sealing-cone arrangement supports compatible installations. The M12 A-coded connector provides convenient electrical integration. The passive RTD design allows signal evaluation through a remote controller. This makes the sensor useful for PLC and industrial temperature-control systems.
Pt 100 Class A
20 mm installation length
G 1/2 external thread
6 mm probe
-40...150 °C
160 bar pressure rating
Electropolished wetted surfaces
M12 connector
Gold-plated contacts
Passive RTD
IP68 / IP69K
Fast response
Compact installation
External evaluation
Industrial process design
Compact process piping
Food equipment
Beverage machinery
Cooling systems
Heating systems
Pumps
Process skids
Machine tools
Liquid temperature monitoring
Gas temperature monitoring
PLC RTD systems
Temperature controllers
Thermal monitoring
Industrial automation
Equipment protection
| Specification | Details |
|---|---|
| Product Model | TM4591 |
| Type Code | TM-020KFER12- /US/ |
| Sensor | Pt 100 Class A |
| Standard | DIN EN 60751 |
| Measuring Range | -40...150 °C |
| Installation Length | 20 mm |
| Probe Diameter | 6 mm |
| Process Connection | G 1/2 external thread |
| Seal | Sealing cone |
| Media | Liquids and gases |
| Pressure Rating | 160 bar |
| Minimum Installation Depth | 15 mm |
| Accuracy | ±(0.15 K + 0.002 × |
| Response T05/T09 | 1 / 3 s |
| Output | Passive RTD |
| Housing | Cylindrical |
| Material | 316L / 1.4404 |
| Wetted Material | Electropolished stainless steel |
| Connector | M12 A-coded |
| Contacts | Gold-plated |
| Protection Class | III |
| Protection | IP68 / IP69K |
| Ambient Temperature | -25...80 °C |
| Storage Temperature | -40...100 °C |
| Evaluation | External |
| Installation | Process mounted |
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