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Thermocont TS4L

Thermocont TS4L

Temperaturesensors and -transmitters Pt100 with self-monitoring for food

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  • Wide range of applications
  • Wide process temperature range –99,9°C to +500°C
  • High process pressure tightness up to 50 bar
  • Wide variety of hygienic and aseptic process connections 
  • High protection class IP65 / IP67
  • Wide environmental temperature range –40°C to +85°C
  • Long term stable temperature sensor platinum Pt100 class A – DIN EN60751
  • Increased process safety and cost saving by self-supervising measuring system  
  • High accuracy – characteristic deviation ≤ 0,5% of measuring range
  • Integrated evaluation electronic: Digital display, function LED’s, keyboard / 2x PNP switch output / 1x current output 4…20mA / Connector plug M12
  • High operating comfort: enclosure and display rotatable for optimal operability in each installation position
  • Robust high brightness LED display for best readability
  • 3-key operation without additional assistance with tactile feedback

The devices of series Thermocont® TSL4 with integrated digital evaluation electronic are compact temperature switches for monitoring, control as well as continuous measurement of process temperatures from –99,9°C to +500°C in gases, vapors, liquids and dusts in hygienic application fields at process pressures of up to 40 bar.

Suitable for hygienic and aseptic applications in

  • Food and beverage industry
  • Pharmaceutical industryC
  • Biotechnology
  • Sterile process engineering
Function description

The device is mounted into the wall of the container or of the pipeline. By using a neck tube of a adequate length between the respective process connection and the connection housing at high medium temperatures it can be achieved that the temperature in the area of the connection housing does not exceed the permitted environmental temperatures. The sensor tube is the junction point with the applied medium and is in direct contact with it. It contains the temperature sensor that is used for recording the temperature and converting it into an electrical signal. At the device Thermocont® TL4S the recording of the process temperature is made by a resistive temperature sensor element Pt100 of class A. This allows a precise and long term stable temperature measurement. At device Thermocont® TL4D the recording of the process temperature is made in parallel at first by a resistive temperature sensor element Pt100 of class A and second by a semiconductor temperature sensor. Because of the parallel measurement with two different thermal coupled sensor elements, the temperature switch detects impermissible drifts of a sensor and errors at the temperature measurement automatically. At the failure of one of the two sensor elements the temperature measurement can be also continued with the second element, what realizes a redundancy function.

Technichal data

Supply voltage: 10,5…35VDC, reverse polarity protected
Supply current: ≤ 60mA Analogue output max. 22,5mA, Switch output with no load Switch output S1 / S2Function: PNP switch to +LOutput current: 0… ≤ 200mA current limited, short circuit protected

Analogue output 4...20mA
Operating range: 
3,9…21mA, min. 3,8mA, max. 22mA
Permitted load: ≤ (US - 10,5V) / 20mA
Start-up time: ≤ 1 ms

Measuring accuracy
Characteristic deviation
: Display / Switch output: ≤ ±0,6% FS
Current output: ≤ ±0,9Kat ±100°C
Type self-supervision: Display / Switch output: ≤ ±0,2K / Current output: ≤ ±0,4K / Drift monitoring: ≤ ±0,2K
Long term drift: ≤ ± 0,1% FS / year
Temperature deviation: Display / Switch output: ≤ ±0,003% FS/ K / Current output: ≤ ±0,008% FS/ K

Sensor tube
: (process wetted) Steel 1.4404/316L / Steel 1.4571/316Ti
Process connection: (rocess wetted) Steel 1.4404/316L / Steel 1.4571/316Ti
Surface quality: Ra < 0,8μm
Neck tube: CrNi-Steel
Terminal enclosure: CrNi-Steel
Control panel surface: PES
Electrical connection part: Device plug PUR
Pressure compensation element: Acrylic copolymer
Gaskets: FPM – fluorelastomere (e.g. Viton®)

Environmental conditions
Environmental temperature
: -40°C...+85°C
Process temperature: depending on type: -99,9°C...+200°C / -99,9°C...+500°C / -50°C...+175°C
Process pressure: depending on type: ≤ 50 bar / ≤ 40 bar / ≤ 25 bar / ≤ 16 bar
Protection: IP65/IP67 EN/IEC 60529