The AMETEK PTC-155 is a professional dry-block temperature calibrator designed for highly accurate temperature calibration in industrial environments, calibration laboratories and demanding field applications. Developed by AMETEK JOFRA, the PTC-155 combines advanced temperature control technology, excellent stability and high temperature homogeneity in a portable calibration instrument.
With a temperature range from −25 °C to +155 °C, the AMETEK PTC-155 is particularly suitable for calibrating resistance thermometers, Pt100 sensors, thermocouples, temperature transmitters and temperature switches.
The calibrator offers an accuracy of ±0.18 °C using the internal reference sensor and up to ±0.06 °C when using a suitable external JOFRA STS reference sensor. Excellent temperature stability of ±0.01 °C ensures highly repeatable calibration conditions.
One of the most important features of the AMETEK PTC-155 is its active dual-zone temperature control. This technology improves temperature homogeneity throughout the calibration insert and minimizes the influence of thermal loading caused by sensors under test.
The AMETEK PTC-155 is available in three configurations: the basic PTC-155 A model, the PTC-155 B with external reference and sensor-under-test inputs, and the PTC-155 C with an external reference sensor input.
An intuitive color display, automatic calibration functions, USB communication and JofraCal calibration software simplify operation and support efficient calibration workflows.
At europascal, the AMETEK PTC-155 provides an excellent solution for professional temperature calibration. 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
- Professional dry-block temperature calibrator
- Accuracy of ±0.18 °C with internal reference
- Accuracy down to ±0.06 °C with external reference
- Excellent temperature stability of ±0.01 °C
- Active dual-zone temperature control
- Excellent radial and axial temperature homogeneity
- Radial homogeneity of 0.01 °C
- Fast heating and cooling performance
- Heating from 23 °C to 155 °C in approximately 12 minutes
- Cooling from 155 °C to 23 °C in approximately 10 minutes
- Cooling from 23 °C to −25 °C in approximately 15 minutes
- Large color display
- Automatic temperature stepping
- Automatic temperature switch testing
- External reference sensor input on B and C models
- Sensor-under-test input on B models
- Compatible with intelligent JOFRA STS reference sensors
- True-Ohm measurement technology
- USB communication interface
- JofraCal calibration software
- Interchangeable calibration inserts
- Multi-hole inserts available
- Suitable for simultaneous calibration of multiple sensors
- Compact and portable construction
- Ideal for laboratory and field calibration
- Professional calibration support from europascal
Wide Temperature Range from −25 °C to +155 °C
The AMETEK PTC-155 covers a temperature range from:
−25 °C to +155 °C
This range is specified at an ambient temperature of approximately 23 °C.
The wide operating range makes the calibrator suitable for temperature calibration applications below, around and above room temperature.
Typical applications include the calibration of Pt100 resistance thermometers, industrial temperature sensors, temperature transmitters and temperature switches.
The AMETEK PTC-155 is particularly useful in industries where accurate temperature measurement is essential for product quality, process stability and regulatory compliance.
These include pharmaceutical manufacturing, food processing, biotechnology, medical technology and industrial production.
High Accuracy Temperature Calibration
The AMETEK PTC-155 provides excellent accuracy for professional temperature calibration.
With the internal reference sensor, the manufacturer specifies:
Accuracy: ±0.18 °C
When using a suitable external JOFRA STS reference sensor, the specified accuracy improves to:
Accuracy: ±0.06 °C
The external reference sensor measures the temperature directly within the calibration insert.
This helps reduce the influence of temperature differences between the internal control sensor and the actual measuring location.
The external reference sensor is particularly useful when calibrating temperature sensors with demanding accuracy requirements.
The PTC-155 B and PTC-155 C configurations support external reference sensor operation.
Excellent Temperature Stability
Temperature stability is one of the most important characteristics of a professional temperature calibrator.
The AMETEK PTC-155 offers a temperature stability of:
±0.01 °C
This specification applies under the defined manufacturer test conditions after the stability indicator has been active for ten minutes.
The stability is evaluated over a measurement period of 30 minutes.
Excellent temperature stability reduces fluctuations during calibration and supports repeatable measurement results.
This is particularly important when calibrating high-accuracy resistance thermometers and reference temperature sensors.
Active Dual-Zone Temperature Control
One of the most important advantages of the AMETEK PTC-155 is its active dual-zone temperature control.
Conventional dry-block calibrators can experience temperature gradients caused by heat losses at the top of the calibration insert.
These gradients can become more pronounced when several temperature sensors are inserted into the block.
The AMETEK PTC-155 uses two independently controlled temperature zones.
The lower zone controls the calibration temperature.
The upper zone compensates for heat losses caused by the surrounding environment and the sensors under test.
This design improves axial temperature homogeneity and reduces the influence of sensor loading.
The active dual-zone system is particularly beneficial when calibrating multiple sensors simultaneously.
Excellent Temperature Homogeneity
Temperature homogeneity describes how uniformly the temperature is distributed within the calibration insert.
The AMETEK PTC-155 offers excellent radial homogeneity.
The manufacturer specifies:
Radial homogeneity: 0.01 °C
This value describes the temperature difference between measuring holes under the specified test conditions.
Good radial homogeneity is important when several temperature sensors are calibrated simultaneously.
The active dual-zone temperature control also improves axial homogeneity.
This helps ensure that sensors with different immersion depths and sensing-element positions experience comparable calibration conditions.
Fast Heating and Cooling
The AMETEK PTC-155 is designed for efficient temperature calibration.
The manufacturer specifies the following typical heating and cooling times:
Heating from −25 °C to 23 °C: 4 minutes
Heating from 23 °C to 155 °C: 12 minutes
Cooling from 155 °C to 23 °C: 10 minutes
Cooling from 23 °C to −25 °C: 15 minutes
These short transition times reduce waiting periods during calibration procedures.
This is particularly useful when several calibration points must be measured.
For example, a temperature sensor may be calibrated at 0 °C, 50 °C, 100 °C and 150 °C using a single calibration instrument.
Dry-Block Calibration Technology
The AMETEK PTC-155 uses dry-block temperature calibration technology.
The instrument contains a temperature-controlled metal block with an interchangeable calibration insert.
The temperature sensor under test is inserted into a suitable hole.
The block is heated or cooled to the selected temperature.
After thermal stabilization, the sensor indication can be compared with the reference temperature.
Dry-block technology offers several advantages compared with liquid calibration baths.
There is no calibration liquid to transport, refill or clean.
The instrument can be transported easily and used directly at industrial installations.
The dry calibration environment also reduces the risk of contamination.
Interchangeable Calibration Inserts
The AMETEK PTC-155 supports 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 × 150 mm length
The immersion depth is approximately:
160 mm
Multi-hole inserts allow several temperature sensors to be calibrated simultaneously.
This can significantly improve calibration efficiency when multiple sensors require the same temperature points.
The insert configuration should be selected according to the sensor dimensions, immersion requirements and measurement uncertainty.
External Reference Sensor Input
The AMETEK PTC-155 B and AMETEK PTC-155 C models include an external reference sensor input.
This allows the calibrator to measure the temperature using a compatible JOFRA STS reference sensor.
Suitable reference sensors include:
JOFRA STS-102-A
JOFRA STS-150-A-915
The external reference sensor provides an independent measurement of the calibration temperature.
The manufacturer specifies accuracy down to ±0.06 °C when using the appropriate external reference sensor.
The external sensor also enables the Set Follows True function.
Set Follows True Technology
The AMETEK PTC-155 supports the Set Follows True function when equipped with an appropriate external reference sensor.
In this operating mode, the external reference sensor measures the actual temperature in the calibration insert.
The calibrator automatically adjusts the block temperature until the external reference sensor reaches the selected setpoint.
This reduces temperature differences between the internal control sensor and the actual calibration location.
The function is particularly useful when the calibration insert contains sensors with different thermal characteristics.
Intelligent Reference Sensors
AMETEK JOFRA reference sensors feature intelligent connectors that store sensor-specific calibration coefficients.
When the sensor is connected to a compatible PTC calibrator, the instrument recognizes the sensor and retrieves the stored calibration information.
This plug-and-play concept simplifies the calibration setup.
It also reduces the risk of manually entering incorrect sensor coefficients.
The intelligent reference sensor system is especially useful in laboratories where several reference sensors are used.
Sensor-Under-Test Input
The AMETEK PTC-155 B includes an integrated sensor-under-test input.
This allows the calibrator to measure the electrical output of compatible temperature sensors directly.
Depending on the selected sensor type and configuration, the instrument can be used with resistance thermometers, thermocouples and temperature transmitters.
The integrated input simplifies calibration because an additional electrical measuring instrument may not be required for supported sensor types.
This makes the PTC-155 B particularly suitable for automated calibration procedures.
Automatic Temperature Stepping
The AMETEK PTC-155 includes automatic temperature stepping functions.
Users can define a sequence of temperature setpoints.
The calibrator automatically moves through the programmed temperature steps.
This reduces manual operation and helps ensure consistent calibration procedures.
Automatic stepping is particularly useful for repetitive calibration tasks involving several temperature sensors.
The function can also help reduce operator errors during routine calibration.
Automatic Temperature Switch Testing
The AMETEK PTC-155 supports automatic temperature switch testing.
Temperature switches are used to monitor temperature limits in industrial processes.
During testing, the calibrator increases or decreases the temperature until the switch changes state.
The corresponding switching temperature can be determined.
The reset temperature can also be measured.
The difference between the switching and reset temperatures is the switching hysteresis.
This function is particularly useful for testing thermostats and industrial temperature switches.
Intuitive Color Display
The AMETEK PTC-155 features a large color display.
The display provides information about:
- Current block temperature
- Selected temperature setpoint
- Temperature stability
- Heating and cooling status
- External reference temperature
- Sensor-under-test readings on supported models
- Calibration functions
- Instrument settings
The intuitive interface simplifies daily operation and reduces training requirements.
JofraCal Calibration Software
The AMETEK PTC-155 is compatible with JofraCal calibration software.
JofraCal supports automated calibration procedures and measurement documentation.
The software can be used to control compatible temperature calibrators and organize calibration tasks.
It also supports the documentation of measurement results.
This is particularly useful for calibration laboratories and maintenance departments that require repeatable procedures and structured calibration records.
USB Communication
The AMETEK PTC-155 includes a:
USB 2.0 interface
The USB connection enables communication between the calibrator and a computer.
This allows the instrument to be integrated into computer-controlled calibration procedures.
USB communication is particularly useful when using JofraCal software.
Compact and Portable Design
The AMETEK PTC-155 is designed for professional laboratory and field calibration.
The manufacturer specifies dimensions of approximately:
362 × 171 × 363 mm
The weight is approximately:
10.3 kg
The compact design allows the calibrator to be transported between different calibration locations.
Optional protective carrying cases are available.
These cases can also accommodate calibration inserts, reference sensors and additional accessories.
Technical Highlights
| Feature | AMETEK PTC-155 |
|---|---|
| Product type | Professional Dry-Block Temperature Calibrator |
| Manufacturer | AMETEK JOFRA |
| Temperature range | −25 °C to +155 °C |
| Accuracy with internal reference | ±0.18 °C |
| Accuracy with external reference | ±0.06 °C |
| Temperature stability | ±0.01 °C |
| Radial homogeneity | 0.01 °C |
| Temperature control | Active Dual-Zone |
| Heating time, −25 °C to 23 °C | 4 minutes |
| Heating time, 23 °C to 155 °C | 12 minutes |
| Cooling time, 155 °C to 23 °C | 10 minutes |
| Cooling time, 23 °C to −25 °C | 15 minutes |
| Typical stabilization time | 10 minutes |
| Temperature resolution | 1 °C / 0.1 °C / 0.01 °C |
| Temperature units | °C / °F / K |
| Well diameter | 26 mm |
| Insert dimensions | 25.8 × 150 mm |
| Immersion depth | 160 mm |
| External reference sensor input | B and C models |
| Sensor-under-test input | B model |
| Automatic temperature stepping | Yes |
| Temperature switch testing | Yes, configuration dependent |
| Communication | USB 2.0 |
| Calibration software | JofraCal |
| Supply voltage | 115 V / 230 V |
| Maximum power consumption | 400 W |
| Dimensions | 362 × 171 × 363 mm |
| Weight | 10.3 kg |
| Operating ambient temperature | 0 °C to +40 °C |
| Protection class | IP10 |
Available Models
The AMETEK PTC-155 is available in three configurations.
AMETEK PTC-155 A
The basic model provides temperature calibration using the internal reference sensor.
It is suitable for professional dry-block calibration applications that do not require an integrated external sensor input.
AMETEK PTC-155 B
The B model includes:
- External reference sensor input
- Sensor-under-test input
- Advanced calibration functions
This configuration is particularly suitable for automated calibration and measurement documentation.
AMETEK PTC-155 C
The C model includes an external reference sensor input.
It is suitable for applications requiring improved accuracy with an external JOFRA STS reference sensor.
Accessories and Configuration Options
The AMETEK PTC-155 can be configured with various accessories.
Available options include:
- Single-hole calibration inserts
- Multi-hole calibration inserts
- Metric insert sets
- Imperial insert sets
- JOFRA STS reference sensors
- Protective carrying cases
- Carrying cases with trolley
- Sensor support rod sets
- Calibration certificates
- Accredited calibration options
The exact delivery configuration depends on the selected model and ordering options.
Typical Applications
The AMETEK PTC-155 is suitable for:
- Pt100 calibration
- Resistance thermometer calibration
- RTD calibration
- Thermocouple calibration
- Temperature transmitter calibration
- Temperature switch testing
- Thermostat calibration
- Industrial temperature measurement
- Pharmaceutical manufacturing
- Biotechnology
- Medical technology
- 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 reliable temperature measurement results.
europascal provides professional calibration services for temperature measuring instruments, including resistance thermometers, thermocouples, temperature indicators and temperature calibrators.
The AMETEK PTC-155 can be integrated into professional calibration procedures using suitable reference thermometers and calibration inserts.
For metrological traceability and professional calibration services, visit the europascal Calibration Service.
europascal also supports customers with the selection of suitable temperature calibration equipment and accessories.
Why Choose the AMETEK PTC-155?
The AMETEK PTC-155 combines professional temperature calibration performance with advanced temperature control technology.
With a temperature range from −25 °C to +155 °C, the instrument covers many common industrial and laboratory calibration applications.
Accuracy down to ±0.06 °C with an external reference sensor and excellent temperature stability of ±0.01 °C make the calibrator suitable for demanding measurement tasks.
The active dual-zone temperature control provides excellent temperature homogeneity and reduces the influence of sensor loading.
Fast heating and cooling performance helps minimize calibration time.
The interchangeable calibration inserts allow different sensor diameters to be accommodated.
The availability of A, B and C configurations provides flexibility for different calibration requirements.
External reference sensor operation, integrated sensor-under-test measurement on the B model and automatic calibration functions make the AMETEK PTC-155 particularly versatile.
USB communication and JofraCal software support computer-controlled calibration and measurement documentation.
For professional users who require a highly accurate and stable dry-block temperature calibrator, the AMETEK PTC-155 offers an excellent combination of performance, flexibility and reliability.
europascal supports customers with temperature calibration equipment, accessories and professional calibration services.
Further products from AMETEK JOFRA can be found here.
Manufacturer information about the AMETEK PTC-155 can be found on the official AMETEK website.
