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TOPSW-11, TOPSW-21 series

Mica band heaters data sheet – Data Sheet

Temperature Sensors with Replaceable Measuring Inserts -TOPSW-11, TOPSW-21 series

>> This sensor is used for temperature measurement of liquid and gaseous media. The temperature sensor design (replaceable measuring insert) is suitable for various industrial applications. Replacement of the measuring insert does not cause the technological installation damage. Spring-loaded insert ensures an excellent connection with the bottom of the sensor thermowell.

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Temperature range / sensing element
0÷540ºC Pt100 class B
0÷540ºC K, J class 2


Measuring insert
2-, 3-, 4-wire connection (for Pt100)
2-, 3-wire connection (for 2xPt100)


material: boiler steel 1.7335 (15HM)
diameter (mm): 18 (SW1) or 24 (SW2)
dimension (mm): 100/ 35, 140/ 65, 200/ 65, 260/ 125 (SW1)
140/ 65, 200/ 65, 260/ 125 (SW2)

Other parameters acc. to requirements

Temperature transmitter application

Temperature transmitter with standard 4 to 20mA, 0 to 10V output signals and with standard communication protocols can be mounted in the connection head. Transmitter installation is carried out directly on the measuring insert (in place of a terminal block) or in the high cover connection head (solution used to enable installation of two transmitters).

Local display application

The temperature sensor can be equipped with the connection head enabling the local LED display installation. The local display operates in current loop 4÷20mA. This version makes the local temperature reading and transmission of the analogue signal possible.

ATEX design

For hazardeous areas adequate sensor constructions are available:

  • intrinsically safe Exi
  • flameproof Exd

These designs possess EC-Type Examination Certificate in compliance with 94/9/EC(ATEX) directive.

Non-standard design

Immersion length, process connection thread, shape and material of the thermowell, connection head type and the measuring insert parameters can be customized Please contact our technical sales team for further information.


Standard length
Immersion lengthL/L (mm) Measuring insert lengthL (mm)
100/35 273
140/65 313
200/65 373
260/135 433
Maximum pressure
Immersion lengthL(mm) Maximum pressure [MPa]
Thermowell SW1 Thermowell SW2
air water air water
100 15.7 44
140 13.4 22 44
Tolerance for classes of sensors with resistors Pt acc. to PN-EN 60751
Sensor classes
  Range of application (°C) Formula for calculating acceptable deviations (°C)
AA -50 to +250 T = ±(0,10 + 0,0017 |t|)
A -100 to +450 T = ±(0,15 + 0,002 |t|)
B -196 to +600 T = ±(0,3 + 0,005 |t|)
C -196 to +600 T = ±(0,06 + 0,01 |t|)
|t|- absolute value of temperature.


Measurement circuit
1 x Pt100
2-wire 3-wire 4-wire
2 x Pt100
2-wire 3-wire 4-wire
X X  
1 x TC 2 x TC  
2-wire 2-wire  
X X  
Tolerance for thermocouple classes acc. to PN-EN 60584
Thermocouple type Class 1
Range of application (°C) Tolerance (°C)
J Fe-CuNi from -40 to +375 from +375 to +750 ±1,5
±0,004 |t|
K NiCr-NiAl from -40 to +375 from +375 to +1000 ±1,5
±0,004 |t|


Thermocouple type Class 2
Range of application (°C) Tolerance (°C)
J Fe-CuNi from -40 to +333 from +333 to +750 ±2,5±0,0075 |t|
K NiCr-NiAl from -40 to +333 from +333 to +1200 ±2,5±0,0075|t|


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