The TAD991 is an intelligent temperature transmitter designed for dependable process temperature measurement and sensor-condition monitoring. It combines a Pt1000 primary element with an NTC reference element to provide additional measurement security. The transmitter offers analogue, switching and IO-Link communication capabilities for flexible industrial integration. Its G 1/2 process connection and 33 mm installation length provide a compact solution for process equipment. The device is well suited to applications where temperature accuracy, drift detection and process reliability are critical.
Explore performance details, construction highlights, applications, and technical information in one clear overview.
The TAD991 is part of the TAD family of self-monitoring temperature transmitters. Its redundant sensing arrangement allows the device to compare temperature behaviour and detect sensor deviations. The backup function improves operational continuity when one sensing element experiences a fault. IO-Link provides digital access to measurement values, parameters and diagnostic information. This makes the transmitter suitable for advanced automation and predictive maintenance strategies.
The transmitter supports a -25...160 °C temperature measuring range. The Pt1000 element provides the main temperature measurement while the NTC element acts as the reference sensor. The analogue output allows integration into standard industrial control loops. The diagnostic output can provide information about sensor drift and fault conditions. These features support more reliable temperature monitoring and improved process quality.
The G 1/2 external thread provides a practical process connection for industrial installations. The 33 mm installation length is suitable for compact temperature measurement points. Stainless-steel wetted materials provide durability in liquid and gas applications. The M12 connection supports reliable industrial electrical integration. Diagnostic functions help maintenance teams identify sensor problems before they affect process performance.
Dual Pt1000 and NTC sensing
Thermally coupled sensor arrangement
Backup measurement capability
Drift detection
-25...160 °C temperature range
IO-Link interface
4...20 mA analogue output
PNP/NPN switching capability
G 1/2 process connection
M12 electrical connection
Industrial process temperature measurement
Food and beverage processing
Liquid temperature monitoring
Gas temperature monitoring
Heating and cooling systems
Hygienic process equipment
PLC temperature control
Process diagnostics
Preventive maintenance
Temperature quality assurance
The TAD991 is part of the TAD family of self-monitoring temperature transmitters. Its redundant sensing arrangement allows the device to compare temperature behaviour and detect sensor deviations. The backup function improves operational continuity when one sensing element experiences a fault. IO-Link provides digital access to measurement values, parameters and diagnostic information. This makes the transmitter suitable for advanced automation and predictive maintenance strategies.
The transmitter supports a -25...160 °C temperature measuring range. The Pt1000 element provides the main temperature measurement while the NTC element acts as the reference sensor. The analogue output allows integration into standard industrial control loops. The diagnostic output can provide information about sensor drift and fault conditions. These features support more reliable temperature monitoring and improved process quality.
The G 1/2 external thread provides a practical process connection for industrial installations. The 33 mm installation length is suitable for compact temperature measurement points. Stainless-steel wetted materials provide durability in liquid and gas applications. The M12 connection supports reliable industrial electrical integration. Diagnostic functions help maintenance teams identify sensor problems before they affect process performance.
Dual Pt1000 and NTC sensing
Thermally coupled sensor arrangement
Backup measurement capability
Drift detection
-25...160 °C temperature range
IO-Link interface
4...20 mA analogue output
PNP/NPN switching capability
G 1/2 process connection
M12 electrical connection
Industrial process temperature measurement
Food and beverage processing
Liquid temperature monitoring
Gas temperature monitoring
Heating and cooling systems
Hygienic process equipment
PLC temperature control
Process diagnostics
Preventive maintenance
Temperature quality assurance
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