The IFM TAD191 temperature transmitter with drift detection provides reliable and self-monitoring temperature measurement for industrial and hygienic process applications. It uses thermally coupled Pt1000 and NTC sensing elements with a backup function, allowing measurement to continue if one sensing element fails. The transmitter provides 4–20 mA analogue output, configurable diagnostic output and IO-Link communication. Its G1/2 threaded process connection, 87.5 mm installation length and IP68/IP69K protection make it suitable for demanding process environments.
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The TAD191 is an intelligent IFM temperature transmitter designed for process applications where reliable measurement and sensor diagnostics are important. Its Pt1000 and NTC elements work together to provide redundant temperature measurement. The sensor can detect drift and faults and communicate diagnostic information to connected control systems. IO-Link provides access to process values, configuration parameters and device diagnostics, making the transmitter suitable for modern industrial automation.
The TAD191 offers a scalable temperature measuring range from -25 to 160 °C and has a factory setting of 0 to 150 °C. Drift warning and drift alarm thresholds can be configured between 0.2 and 5 °C with 0.05 °C adjustment steps. Its 4–20 mA analogue output provides standard industrial signal transmission, while the second output can be configured for switching or diagnostic functions. Dynamic response is approximately 3 seconds for T05 and 6 seconds for T09.
The TAD191 uses a G1/2 external threaded process connection and provides an 87.5 mm installation length. The wetted components are made from stainless steel 316L/1.4404 and have a surface roughness below Ra 0.6 µm. The sensor is suitable for liquids and gases and has a pressure rating of 50 bar. Its IP68/IP69K protection, stainless-steel construction and gold-plated M12 contacts make it suitable for food processing, beverage systems, process equipment and industrial temperature monitoring.
Pt1000 and NTC thermally coupled elements
Redundant temperature measurement
Backup function if one sensor element fails
Integrated drift monitoring
Drift warning and alarm functions
-25 to 160 °C measuring range
Scalable temperature range
4–20 mA analogue output
Configurable switching output
Diagnostic output for drift and fault monitoring
IO-Link communication
87.5 mm installation length
10 mm probe diameter
G1/2 external threaded connection
50 bar pressure rating
IP68 / IP69K protection
Gold-plated M12 contacts
5-point calibration certificate included
Food and beverage processing
Industrial process equipment
Hygienic process systems
Process tanks
Pipeline temperature monitoring
Liquid temperature measurement
Gas temperature measurement
Heating systems
Cooling systems
Process automation
Temperature control
Sensor condition monitoring
Predictive maintenance
Equipment protection
| Specification | Details |
|---|---|
| Product Code | TAD191 |
| Brand | IFM |
| Product Type | Temperature transmitter with drift detection |
| Model | TAD088KLER12-A-DKG/US |
| Measuring Elements | 1 x Pt1000 + 1 x NTC |
| Measuring Element Design | Thermally coupled |
| Backup Function | Yes |
| Measuring Range | -25 to 160 °C |
| Temperature Range | -13 to 320 °F |
| Factory Setting | 0 to 150 °C |
| Drift Warning | 0.2 to 5 °C |
| Drift Alarm | 0.2 to 5 °C |
| Drift Setting Step | 0.05 °C |
| Resolution | 0.05 °C |
| Analogue Output | 4–20 mA |
| Digital Output | 1 |
| Diagnostic Function | Drift and fault monitoring |
| Output Function | NO / NC / diagnostic signal |
| Communication | IO-Link |
| IO-Link Revision | 1.1 |
| IO-Link Transmission | COM1, 4.8 kBaud |
| Supply Voltage | 18–32 V DC |
| Current Consumption | 6 mA at 24 V |
| Electrical Design | PNP/NPN |
| Process Connection | G1/2 external thread |
| Installation Length | 87.5 mm |
| Probe Diameter | 10 mm |
| Media | Liquids and gases |
| Pressure Rating | 50 bar |
| Minimum Installation Depth | 25 mm |
| Accuracy | ±0.2 K from -10 to 130 °C |
| Dynamic Response T05/T09 | 3 s / 6 s |
| Ambient Temperature | -25 to 70 °C |
| Storage Temperature | -40 to 85 °C |
| Protection Rating | IP68 / IP69K |
| Protection Class | III |
| Housing Material | Stainless steel, PEI, FKM |
| Wetted Parts | Stainless steel 316L / 1.4404 |
| Wetted Surface Roughness | Ra <0.6 µm |
| Tightening Torque | 30–50 Nm |
| Electrical Connection | 1 x M12, A-coded |
| Connector Contacts | Gold-plated |
| Shock Resistance | 50 g, 11 ms |
| Vibration Resistance | 20 g, 10–2000 Hz |
| MTTF | 213 years |
| Power-on Delay | 8 s |
| Integrated Watchdog | Yes |
| Manufacturer | IFM electronic |
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