01
Numeric process display
Operators and maintenance teams can see the current temperature without opening the PLC or HMI.
ifm · Temperature
ifm TN Temperature Sensors
Temperature measurement with a bright local display, configurable switching/analogue functions and IO-Link. TN is designed for industrial applications where operators need the process temperature visible directly at the machine.
Local 4-digit display−50…150 °CSwitch + transmitterIO-Link25…150 mm probes
Temperature range−50…150 °CCurrent TN family
Insertion25…150 mmDepending on connection/model
Display4-digitLocal numeric process value
InterfaceIO-LinkDigital value, setup and diagnostics
Local visibility
Temperature and switching status at the machine
TN combines a compact RTD probe with display, local programming and configurable outputs.
02
Two-colour visualisation
Configure display colour to make normal or alarm states easier to recognise.
03
Switching and analogue functions
Use hysteresis/window switching and analogue output behaviour depending on the selected TN model.
04
IO-Link configuration
Parameterise setpoints, offsets and device behaviour centrally.
Typical applications
Built for industrial temperature points where local indication adds value
01
Protect hydraulic systems from overheating
The integrated RTD has no moving mechanical switch parts, while the display gives immediate temperature visibility.
02
Confirm machine cooling performance
Probe lengths from 25 to 150 mm support many industrial pipe, manifold and vessel installations.
Sensing technology
Thin-film RTD construction is designed for repeatable thermal response
ifm describes a controlled thin-film carrier and probe-tip assembly that keeps the RTD element in consistent contact with the inner sheath wall, reducing thermal mass between the process and sensing element.
Direct response pathControlled sensor placement reduces unnecessary thermal resistance.
No mechanical switchElectronic measurement avoids the drift/sticking behaviour of traditional mechanical temperature switches.
Rotatable bodyThe housing can be aligned after the sensor is mounted so the display is easy to read.
Minimum immersionifm recommends at least 12 mm insertion into the medium for best performance.
IO-Link value
Digital temperature, parameter backup and zero-point adjustment
TN's IO-Link functions add configuration and device-management capability beyond the local display.
01
Transmit temperature without analogue conversion losses
Use the IO-Link process value directly where the control architecture supports it.
02
Change parameters centrally
Switching values and device parameters can be adjusted without manual button entry.
03
Support automatic device replacement
Stored parameters can simplify replacement in an IO-Link architecture.
04
Zero-point adjustment
Use the supported calibration offset to compensate a known installation measurement offset.
Current TN selection
Select by process connection and probe length
| Model | Insertion | Process connection | Signal / interface | Use when |
|---|---|---|---|---|
| TN2105 | 25 mm | G 1/4 | Transmitter / switch / IO-Link | Compact BSPP connection |
| TN2115 | 50 mm | G 1/4 | Transmitter / switch / IO-Link | More immersion depth |
| TN2303 / TN2313 / TN2333 / TN2343 | 30 / 50 / 100 / 150 mm | 1/2" NPT | Transmitter / switch / IO-Link | NPT process route |
| TN2405 / TN2415 / TN2435 / TN2445 | 30 / 50 / 100 / 150 mm | G 1/2 | Transmitter / switch / IO-Link | BSPP G 1/2 route |
| TN2603 / TN2613 | 25 / 50 mm | 1/4" NPT | Transmitter / switch / IO-Link | Compact NPT route |
Key technical data
Keep output configuration tied to the exact TN order number
TN family selection data
The family shares a common −50…150 °C range and display concept, but output combinations and process connections must be verified on the selected part number.
Measuring range−50…150 °C
Insertion lengths25…150 mm
Display4-digit numeric + status LEDs
InterfaceIO-Link
Process connectionsG 1/4, G 1/2, 1/4 NPT, 1/2 NPT, M18 internal thread routes
Installation guidanceMinimum 12 mm immersion into the medium
Do not assume all TN models have the same analogue output. For example, analogue scaling functions apply to the relevant TN2xxx output variants and should be checked against the exact product data.
Requirement capture
Inputs required to select the TN sensor
Temperature rangeNormal and worst-case process temperature.
ConnectionG 1/4, G 1/2, 1/4 NPT, 1/2 NPT or other fitting route.
Probe lengthAvailable insertion depth and pipe/vessel geometry.
Output needSwitching, analogue signal, IO-Link or combination.
Display useLocal operator indication and preferred display orientation.
ProcessMedium, pressure, flow velocity and thermowell requirement.