The AMETEK CTC-155 is a compact and highly efficient dry-block temperature calibrator designed for accurate temperature calibration in industrial environments, laboratories and field service applications. Developed by AMETEK JOFRA, the CTC-155 combines advanced temperature control technology, fast heating and cooling performance, and an intuitive user interface in a portable instrument.

With a temperature range from -25°C to +155°C, the AMETEK CTC-155 is ideal for calibrating resistance thermometers, Pt100 sensors, thermocouples, temperature transmitters and temperature switches. Its dry-block technology eliminates the need for calibration liquids, making temperature calibration cleaner, faster and easier to perform.

The AMETEK CTC-155 offers an accuracy of ±0.3°C with the internal reference sensor and up to ±0.2°C when using a suitable external reference sensor. Temperature stability of ±0.04°C ensures reliable conditions for repeatable calibration measurements.

The calibrator features a modern color display, automatic temperature stepping, programmable calibration sequences and an integrated temperature switch test function. These capabilities help technicians perform routine calibration tasks efficiently while reducing manual intervention.

The AMETEK CTC-155 is available in two configurations: the CTC-155 A basic model and the CTC-155 C version with an external reference sensor input. The C model allows users to improve calibration accuracy by measuring the actual temperature with a compatible JOFRA STS reference sensor.

At europascal, the AMETEK CTC-155 is an excellent choice for professional temperature calibration applications. europascal supports customers with temperature calibration equipment, accessories and professional calibration services.

For reliable measurement results and metrological traceability, visit the europascal Calibration Service.

Your Benefits at a Glance

• Temperature range from -25°C to +155°C
• Compact dry-block temperature calibrator
• Accuracy of ±0.3°C with internal reference
• Accuracy down to ±0.2°C with external reference
• Excellent temperature stability of ±0.04°C
• Fast heating and cooling performance
• Heating from 23°C to 155°C in approximately 13 minutes
• Cooling from 155°C to 23°C in approximately 12 minutes
• Cooling from 23°C to -25°C in approximately 16 minutes
• Large, intuitive color display
• Automatic temperature stepping
• Up to 12 programmable temperature steps
• Automatic temperature switch testing
• Programmable temperature setpoints
• Optional external reference sensor input
• Compatible with JOFRA STS reference sensors
• MVI technology for improved mains voltage immunity
• USB communication interface
• JofraCal calibration software included
• Interchangeable calibration inserts
• Multi-hole inserts available
• Lightweight and portable construction
• Suitable for laboratory and field calibration
• Ideal for Pt100 and thermocouple calibration
• Professional calibration support from europascal

Wide Temperature Range from -25°C to +155°C

The AMETEK CTC-155 covers a temperature range from:

-25°C to +155°C

This range is specified at an ambient temperature of approximately 23°C.

The achievable minimum temperature depends on ambient conditions. At an ambient temperature of 0°C, the calibrator can reach approximately -39°C, while at an ambient temperature of 50°C, the minimum temperature is approximately -7°C.

This makes the AMETEK CTC-155 particularly useful for temperature calibration applications near and below room temperature.

Typical applications include the calibration of Pt100 resistance thermometers, industrial temperature sensors, temperature switches and process temperature transmitters.

The wide operating range allows technicians to perform multiple calibration tasks using a single portable instrument.

High Accuracy Temperature Calibration

The AMETEK CTC-155 provides excellent accuracy for an industrial dry-block calibrator.

With its internal reference sensor, the manufacturer specifies:

Accuracy: ±0.3°C

When using a compatible external reference sensor with the C model, accuracy can be improved to:

Accuracy: ±0.2°C

This allows users to select the appropriate configuration according to their measurement uncertainty requirements.

The internal reference sensor is suitable for many routine industrial calibration applications.

For more demanding measurements, the external reference sensor provides an additional measurement of the actual calibration temperature.

Excellent Temperature Stability

Temperature stability is an important factor in accurate temperature calibration.

The AMETEK CTC-155 offers temperature stability of:

±0.04°C

Stable calibration conditions help reduce measurement fluctuations during the calibration process.

This is particularly important when calibrating temperature sensors with small tolerances.

The calibrator continuously regulates the block temperature to maintain the selected temperature setpoint.

The stability indicator informs the operator when the defined stability conditions have been reached.

Fast Heating and Cooling

The AMETEK CTC-155 is designed for efficient temperature calibration.

The manufacturer specifies the following typical performance:

Heating from 23°C to 155°C: 13 minutes

Cooling from 155°C to 23°C: 12 minutes

Cooling from 23°C to -25°C: 16 minutes

These short heating and cooling times reduce waiting periods during calibration.

This is especially beneficial when several calibration points must be measured.

For example, a three-point calibration at 0°C, 50°C and 100°C can be performed efficiently without requiring multiple temperature sources.

Dry-Block Calibration Technology

The AMETEK CTC-155 uses dry-block temperature calibration technology.

The device contains a temperature-controlled metal block with an interchangeable insert.

The temperature sensor under test is placed into a suitable hole in the insert.

The block is heated or cooled to the selected temperature, allowing the sensor to reach thermal equilibrium.

Compared with liquid calibration baths, dry-block technology offers several practical advantages.

There is no calibration liquid to transport, refill or clean.

The system is compact, portable and suitable for use directly at industrial installations.

Interchangeable inserts also allow different sensor diameters to be accommodated.

Interchangeable Calibration Inserts

The AMETEK CTC-155 supports a wide selection of interchangeable calibration inserts.

These inserts are available with individual holes or multiple holes for different sensor diameters.

The manufacturer specifies a well diameter of:

26 mm

The insert dimensions are approximately:

25.8 mm diameter × 100 mm length

The immersion depth, including the insulation plug, is approximately:

120 mm

Multi-hole inserts allow several temperature sensors to be calibrated simultaneously, provided that the thermal loading and measurement uncertainty requirements are considered.

Special inserts can also be selected for particular sensor geometries.

External Reference Sensor Input

The AMETEK CTC-155 C model includes an input for an external reference temperature sensor.

This feature allows the calibrator to measure the actual temperature using a compatible JOFRA STS reference sensor.

Suitable reference sensors include:

JOFRA STS-102-A

JOFRA STS-120-A-915

The external reference sensor can improve the accuracy of the calibration system.

The calibrator supports two important operating modes.

External Reference Mode

In this mode, the external reference sensor provides the reference temperature used for calibration.

Set Follows True Mode

In this mode, the external reference sensor is used both for temperature measurement and for controlling the block temperature.

This allows the block temperature to be adjusted according to the external reference sensor reading.

Automatic Temperature Stepping

The AMETEK CTC-155 includes an automatic temperature stepping function.

Users can program up to:

12 temperature steps

Each step can be configured with a defined temperature setpoint and dwell time.

The calibrator automatically moves through the programmed sequence.

This function is particularly useful for routine calibration procedures involving several measurement points.

Automatic stepping reduces manual operation and helps ensure consistent calibration procedures.

Automatic Temperature Switch Testing

The AMETEK CTC-155 also includes an integrated temperature switch test function.

This allows technicians to determine the switching temperature of thermostats and temperature switches.

The calibrator automatically increases or decreases the temperature until the switch changes state.

The switching point can then be recorded.

The function can also be used to determine the difference between switching and reset temperatures.

This difference is commonly referred to as switching hysteresis or deadband.

The automatic switch test function reduces manual intervention and improves repeatability during routine testing.

MVI Technology for Stable Operation

The AMETEK CTC-155 incorporates AMETEK JOFRA’s MVI technology.

MVI stands for:

Mains Voltage Immunity

This technology helps maintain stable temperature regulation when the mains voltage fluctuates.

In industrial environments, large electrical motors, heaters and other equipment can cause variations in the electrical supply.

The MVI system monitors the mains voltage and helps maintain consistent power delivery to the temperature control system.

This improves the reliability of calibration measurements under demanding operating conditions.

Intuitive Color Display

The AMETEK CTC-155 features a large color display designed for clear and convenient operation.

The display provides information about:

• Current block temperature
• Selected temperature setpoint
• Heating or cooling status
• Temperature stability
• Calibration settings
• Reference sensor status
• Safety warnings
• Calibration reminders

The user interface includes dedicated function keys for commonly used calibration operations.

This allows technicians to access important functions quickly without navigating through complex menus.

JofraCal Calibration Software

The AMETEK CTC-155 is supplied with JofraCal calibration software.

JofraCal supports computer-controlled calibration procedures and measurement documentation.

When connected to a PC, the calibrator can be controlled through its USB interface.

The software allows users to organize calibration procedures, document measurement results and generate calibration reports.

This is particularly useful for laboratories and maintenance departments that require consistent calibration documentation.

USB Communication

The AMETEK CTC-155 includes a:

USB 2.0 interface

The USB connection enables communication between the calibrator and a computer.

This interface can be used with compatible software for remote operation and calibration documentation.

Computer-controlled calibration can help reduce manual data entry and improve the efficiency of repeated calibration procedures.

Compact and Portable Design

The AMETEK CTC-155 is designed for mobile temperature calibration.

The manufacturer specifies dimensions of:

248 × 148 × 305 mm

The weight is approximately:

5.5 kg

This makes the calibrator suitable for transportation between different calibration locations.

Its integrated carrying handle simplifies handling.

An optional protective carrying case is available for additional protection during transport and storage.

Technical Highlights

Available Models

The AMETEK CTC-155 is available in two main configurations.

AMETEK CTC-155 A

The basic model provides temperature calibration using the internal reference sensor.

It is suitable for routine industrial temperature calibration.

AMETEK CTC-155 C

The C model includes an external reference sensor input.

It is particularly suitable for applications requiring improved accuracy and external reference temperature measurement.

Both versions offer the same basic temperature range and dry-block calibration technology.

Scope of Delivery

The standard AMETEK CTC-155 delivery includes:

• AMETEK CTC-155 temperature calibrator
• Mains power cable
• Traceable temperature calibration certificate
• Insert removal tool
• User manual
• Test cables
• USB cable
• JofraCal calibration software

Calibration inserts, external reference sensors and protective carrying cases are available according to the selected configuration.

Typical Applications

The AMETEK CTC-155 is suitable for:

• Pt100 calibration
• Resistance thermometer calibration
• RTD calibration
• Thermocouple calibration
• Temperature transmitter calibration
• Temperature switch testing
• Thermostat calibration
• Industrial temperature measurement
• Process instrumentation
• HVAC applications
• Pharmaceutical production
• Food processing
• Laboratory temperature calibration
• Field temperature calibration
• Maintenance departments
• Quality assurance
• Production testing
• Temperature metrology

Calibration by europascal

Regular calibration is essential for maintaining accurate temperature measurements.

europascal provides professional calibration services for temperature measuring instruments, including resistance thermometers, thermocouples, temperature indicators and temperature calibrators.

The AMETEK CTC-155 can be integrated into professional calibration procedures using suitable reference thermometers and calibration inserts.

For reliable measurement results and metrological traceability, visit the europascal Calibration Service.

europascal also supports customers with the selection of suitable temperature calibration equipment and accessories.

Why Choose the AMETEK CTC-155?

The AMETEK CTC-155 combines compact construction, accurate temperature control and fast calibration performance in a portable dry-block calibrator.

With a temperature range from -25°C to +155°C, the instrument covers many common industrial temperature calibration applications.

Accuracy of ±0.3°C with the internal reference sensor and up to ±0.2°C with an external reference sensor makes the calibrator suitable for a wide range of measurement requirements.

Excellent temperature stability of ±0.04°C supports repeatable calibration measurements.

Fast heating and cooling performance reduces waiting times during calibration procedures.

Automatic temperature stepping, temperature switch testing and the intuitive color display simplify daily operation.

The optional external reference sensor input provides additional flexibility for demanding calibration applications.

USB communication and JofraCal software support computer-controlled calibration and documentation.

With its compact dimensions and weight of approximately 5.5 kg, the AMETEK CTC-155 is an excellent solution for technicians who require professional temperature calibration equipment for laboratory and field use.

europascal supports professional users with temperature calibration equipment, accessories and calibration services.

Further products from AMETEK JOFRA can be found here.

Manufacturer information about the AMETEK CTC-155 can be found on the official AMETEK website.

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