Head-mounted temperature transmitter with universal inputs and galvanic isolation

  • Input: RTD, TC, mV, Ω
  • Output: 2-wire, 4…20 mA
  • Programmable via PC or via the OPTICHECK Temperature Mobile app using Bluetooth® or NFC
  • Accuracy: ±0.08%

OPTITEMP TT 33 C – Head-mounted temperature transmitter

OPTITEMP TT 33 C – Head-mounted temperature transmitter

The OPTITEMP TT 33 C is a universal, programmable 2-wire head-mounted temperature transmitter. The galvanically isolated transmitter works with RTD elements, thermocouple (TC) elements or other inputs (mV and Ω). Due to its rugged design, it withstands external influences such as shocks and vibrations (up to 10 g, as may occur in OEM/machinery applications). With a fast step response time of just 0.15 s and high accuracy (±0.08 % of span) over transmitter lifetime, it is well suited for many industrial applications. Its low temperature drift (±0.01% of span) makes regular calibration less necessary. The temperature transmitter provides a temperature linear current output (4…20 mA). It is also approved for use in hazardous areas.

The OPTITEMP TT 33 C features various useful functions including runtime counter, tracking and backup of previous configuration, ambient temperature log, output simulation for loop testing as well as extended diagnostics complying with NAMUR NE 107. The head-mounted transmitter supports wireless Near Field Communication (NFC) as well as Bluetooth® communication. It can thus be remotely configured and monitored using mobile devices with the OPTICHECK Temperature Mobile app installed. Alternatively, the OPTITEMP TT 33 C can be easily configured from a PC using the ConSoft™ software with OPTITEMP TT-CON EX configuration kit. Thanks to the user-friendly interface, parameters like measurement range or failure indication can be set or re-set within seconds. The temperature transmitter is designed to be mounted in a "B connection head" or larger. As an alternative it can also be mounted on a DIN rail using an optional rail mounting kit. A dedicated rail-mounted version for DIN rails is available with the OPTITEMP TT 33 R.

Product highlights

  • Completely universal digital device
  • Fast step response time and high accuracy over transmitter lifetime
  • Configuration without external power supply (via the OPTICHECK Temperature Mobile app or via  PC/software ConSoft)
  • With sensor break monitoring and sensor error correction
  • High degree of functionality and features (incl. runtime counter, output simulation, ambient temperature log etc.)
  • Vibration and shock proof (10 gr)
  • 50-point customer linearisation
  • Extensive diagnostics (NE 107)
  • Galvanic isolation: 1500 VAC
  • RoHS 2 compliant
  • Suitable for connection head B or larger
  • Optional rail mounting kit for installation on a DIN rail (in accordance with DIN EN 60715)

Accessories for this product


Transmitter configuration kit for PC configuration of OPTITEMP transmitters

  • With USB interface, connection cables and ConSoft software
  • Automatic setting of communication port or interfaces
  • Automatic transmitter identification for quick start
  • Manual and installation guide included

View product details


Transmitter configuration kit for remote configuration and monitoring of temperature transmitters

  • Wireless communication between mobile devices and temperature transmitters with Bluetooth® capability
  • For time-saving set-up, service and maintenance in confined space
  • Configuration and real-time monitoring with the dedicated OPTITEMP Connect mobile app
  • Comprehensive package incl. modem, USB cable, batteries, installation quick guide

View product details


Mobile app for wireless device commissioning, verification and monitoring

  • Wireless commissioning and device parametrisation via secure Bluetooth connection
  • Verification without measurement interruption
  • Monitoring of meter performance and application parameters
  • Free download for iOS and Android

View product details

Technical data

Transmitter mountingHead-mounted
Transmitter channels MAX1
Galvanic isolationYes
Galvanic isolation (VAC)1500 VAC
Transmitter inputPotentiometer (Ω), Resistance (RTD), Thermocouple (TC), Voltage (mV)
RTD inputCu10, Ni100, Ni1000, Ni120, Ni50, Pt10, Pt100, Pt1000, Pt50
RTD input / wiring2-wire, 3-wire, 4-wire
TC InputB, C, D, E, J, K, N, R, S, T
Potentiometer input (Ω)100...10000 Ω
Voltage input (mV)-10...1000 mV
Transmitter programmableYes
Configuration methodBluetooth®, NFC (Near Field Communication), PC/ConSoft software
Power supply (VDC)10…36 VDC
10…30 VDC (Ex)
Ambient temperature-40…+85 VDC
-40…185 VDC (Ex)
Diagnostic functionsSensor break detection, Sensor error correction, Signal filtering function


Certificates/Approvals ExATEX, IECEx
NAMUR complianceNE 107, NE 21, NE 43, NE 53, NE 89


Analogue outputs4…20 mA

Related products


Rail-mounted temperature transmitter with universal inputs and galvanic isolation

  • Input: RTD, TC, mV, Ω
  • Output: 2-wire, 4…20 mA
  • Programmable via PC or via the OPTICHECK Temperature Mobile app using Bluetooth® or NFC
  • Accuracy: ±0.08%

View product details