The AMETEK PTC-350 is a professional dry block temperature calibrator designed for accurate, efficient and reliable temperature sensor calibration in industrial environments, calibration laboratories and field service applications.
With a temperature range from +33 °C to +350 °C, excellent temperature stability of ±0.02 °C and an accuracy of ±0.08 °C when using the specified external reference sensor, the AMETEK PTC-350 provides outstanding performance for demanding temperature calibration applications.
The instrument combines patented heating technology with active dual-zone temperature control to ensure fast temperature changes, excellent temperature homogeneity and reliable calibration conditions.
With a heating time of approximately 7 minutes from 33 °C to 350 °C, the PTC-350 significantly reduces waiting times during multi-point calibration procedures.
The calibrator is particularly suitable for calibrating resistance temperature detectors (RTDs), Pt100 sensors, thermocouples, temperature transmitters and temperature switches.
Its portable design, interchangeable calibration inserts, large color display and USB communication interface make it suitable for both laboratory and field calibration.
Depending on the selected configuration, the instrument also supports external reference thermometer measurement, sensor-under-test measurement and automated calibration functions.
For professional temperature calibration equipment and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
- Temperature range from +33 °C to +350 °C
- Internal reference accuracy of ±0.2 °C
- Accuracy of ±0.08 °C with the specified external STS-150 reference sensor
- Excellent temperature stability of ±0.02 °C
- Radial temperature homogeneity of 0.02 °C
- Patented heating technology
- Active dual-zone temperature control
- Heating from 33 °C to 350 °C in approximately 7 minutes
- Cooling from 350 °C to 100 °C in approximately 19 minutes
- Typical stabilization time of 10 minutes
- User-selectable temperature resolution down to 0.01 °C
- Interchangeable calibration inserts
- Calibration well diameter of 26 mm
- Immersion depth of 140 mm
- Large color display
- Intelligent external reference sensors
- USB communication interface
- Automatic temperature stepping
- Optional sensor-under-test measurement
- Optional temperature switch testing
- Compatible with JofraCal calibration software
- Three configurations: PTC-350A, PTC-350B and PTC-350C
- Portable construction weighing approximately 8.2 kg
- Suitable for industrial and laboratory calibration
Temperature Range from +33 °C to +350 °C
The AMETEK PTC-350 provides a temperature calibration range of:
+33 °C to +350 °C
This temperature range covers numerous industrial temperature measurement applications.
Typical calibration temperatures include:
- 50 °C
- 100 °C
- 150 °C
- 200 °C
- 250 °C
- 300 °C
- 350 °C
The temperature range is specified at an ambient temperature of 23 °C.
The instrument is particularly suitable for calibrating temperature sensors used in industrial production, pharmaceutical manufacturing, food processing, heating systems and process instrumentation.
The calibration temperature can be adjusted directly using the instrument’s control panel.
For demanding calibration applications, sufficient stabilization time must be allowed before recording measurement results.
High Temperature Accuracy
The AMETEK PTC-350 provides two different accuracy specifications.
Accuracy with Internal Reference
The manufacturer specifies:
±0.2 °C
This value describes the temperature accuracy when using the internal reference sensor.
Accuracy with External Reference
When using the specified STS-150 external reference sensor, the manufacturer specifies:
±0.08 °C
This specification applies to the PTC-350B and PTC-350C configurations.
The external reference thermometer measures the temperature within the calibration insert.
This allows more accurate comparison calibrations than relying exclusively on the internal temperature indication.
The specified accuracy applies over a 12-month period under the manufacturer’s defined conditions.
It must not be confused with the expanded measurement uncertainty stated on an individual calibration certificate.
Excellent Temperature Stability
The AMETEK PTC-350 provides excellent temperature stability.
The manufacturer specifies:
±0.02 °C
This specification describes the temperature variation over time under defined operating conditions.
According to the manufacturer, stability is evaluated after the stability indicator has been active for 10 minutes, followed by a 30-minute measurement period.
Excellent temperature stability is essential for accurate temperature sensor calibration.
Stable temperature conditions help reduce measurement variations during comparison measurements.
Active Dual-Zone Temperature Control
The AMETEK PTC-350 features active dual-zone temperature control.
The system uses two independently controlled temperature zones.
The lower zone provides precise temperature control in the calibration area.
The upper zone compensates for heat losses caused by the open top of the calibration block and the inserted temperature sensors.
This technology improves temperature homogeneity and reduces temperature gradients.
It is particularly useful when calibrating sensors with different dimensions or sensing element positions.
The active dual-zone system also supports calibration of certain mechanical temperature sensors and liquid-filled thermometers.
Patented Heating Technology
The AMETEK PTC-350 uses patented heating technology.
This technology enables rapid heating while maintaining excellent temperature stability.
The manufacturer specifies a heating time of:
7 minutes from 33 °C to 350 °C
This fast heating performance significantly reduces waiting times between calibration points.
The heating system is designed to provide efficient temperature control throughout the operating range.
For technicians performing multiple calibrations every day, fast heating can improve productivity and reduce downtime.
Efficient Cooling Performance
The AMETEK PTC-350 also provides efficient cooling performance.
Typical cooling times include:
| Temperature Change | Cooling Time |
|---|---|
| 350 °C to 100 °C | 19 minutes |
| 100 °C to 50 °C | 12 minutes |
These cooling times allow technicians to perform calibration procedures involving both increasing and decreasing temperature sequences.
The actual cooling time depends on ambient conditions, sensor loading and the selected calibration insert.
Short Stabilization Time
The AMETEK PTC-350 features a typical stabilization time of:
10 minutes
This describes the time required for the calibration block to stabilize under the manufacturer’s specified conditions.
The stabilization time of the device under test must also be considered.
Large sensors or sensors with slow thermal response may require additional time before reliable measurements can be recorded.
For demanding calibration procedures, temperature stabilization should be verified using a suitable reference thermometer.
Excellent Radial Temperature Homogeneity
The AMETEK PTC-350 provides excellent radial temperature homogeneity.
The manufacturer specifies a temperature difference between calibration holes of:
0.02 °C
This characteristic is particularly important when calibrating several sensors simultaneously.
Good radial homogeneity helps minimize temperature differences between the reference thermometer and the devices under test.
The actual measurement uncertainty also depends on sensor geometry, immersion depth and thermal contact.
Interchangeable Calibration Inserts
The AMETEK PTC-350 uses interchangeable calibration inserts.
These allow different temperature sensors to be accommodated within the calibration block.
The manufacturer specifies the following dimensions:
| Specification | Value |
|---|---|
| Calibration well diameter | 26 mm |
| Insert outer diameter | 25.8 mm |
| Insert length | 150 mm |
| Immersion depth | 140 mm |
Different insert configurations are available.
Metric and imperial multi-hole inserts allow temperature sensors with different diameters to be calibrated.
The appropriate insert should be selected according to the dimensions of the temperature sensors being calibrated.
Good thermal contact between the sensor and insert helps minimize measurement errors.
Excessive clearance can increase temperature differences between the calibration block and the sensing element.
Intelligent Reference Sensors
The PTC-350B and PTC-350C support intelligent reference temperature sensors.
The STS-150 reference sensor contains individual calibration coefficients stored in its intelligent connector.
When the sensor is connected, the calibrator can automatically recognize the calibration information.
This simplifies reference thermometer setup and reduces the risk of entering incorrect calibration coefficients.
For the PTC-350, AMETEK offers the STS-150 reference sensor with a 4 mm diameter and a length of 165 mm.
The reference sensor is designed for accurate comparison measurements within the calibration block.
True-Ohm Measurement Technology
The PTC-350B and PTC-350C feature an external reference thermometer input using four-wire resistance measurement.
The system uses True-Ohm technology.
This measurement method helps reduce errors caused by thermoelectric voltages in the measurement circuit.
The reference thermometer input is designed for accurate resistance measurement of compatible platinum resistance thermometers.
This provides reliable measurement conditions for demanding temperature calibration applications.
Three Available Configurations
The AMETEK PTC-350 is available in three configurations.
AMETEK PTC-350A
The PTC-350A is the basic professional temperature calibrator.
It provides precise temperature generation and control using the internal temperature reference.
This configuration is suitable for applications where external measurement instruments are already available.
AMETEK PTC-350B
The PTC-350B provides the most comprehensive measurement functionality.
In addition to temperature generation, it includes:
- External reference thermometer input
- Sensor-under-test measurement
- RTD measurement
- Thermocouple measurement
- Current measurement
- Temperature switch testing
- Advanced calibration functions
The PTC-350B is particularly suitable for automated calibration procedures.
AMETEK PTC-350C
The PTC-350C includes an external reference thermometer input.
It is designed for applications requiring accurate temperature comparison measurements using an external reference sensor.
Unlike the PTC-350B, the PTC-350C does not provide the complete sensor-under-test measurement functionality.
Automatic Temperature Stepping
The AMETEK PTC-350 supports automatic temperature stepping.
The user can define multiple temperature setpoints and holding times.
This allows the calibrator to perform predefined temperature sequences automatically.
Automatic stepping is particularly useful for routine calibration procedures.
It reduces manual intervention and helps improve repeatability.
Temperature Switch Testing
The PTC-350B supports temperature switch testing.
The instrument can determine switching points and hysteresis.
This function is useful for checking thermostats and temperature switches used in industrial control systems.
The calibrator changes the temperature while monitoring the electrical switch contact.
The resulting switching temperatures can be documented and evaluated.
This functionality is specific to the PTC-350B configuration.
Large Color Display
The AMETEK PTC-350 features a large color display.
The display provides clear information about the calibration process.
Depending on the selected configuration, displayed values may include:
- Set temperature
- Internal reference temperature
- External reference temperature
- Sensor-under-test indication
- Stability status
- Calibration information
The menu-driven user interface simplifies operation.
The display is designed for convenient use in both laboratory and industrial environments.
USB Communication and JofraCal Software
The AMETEK PTC-350 includes a USB communication interface.
The interface supports communication with compatible calibration software.
The instrument can be used with JofraCal calibration software.
JofraCal supports calibration procedures for temperature sensors, transmitters and temperature switches.
Depending on the instrument configuration and software functionality, calibration data can be transferred to a computer for documentation and evaluation.
The software helps simplify repetitive calibration tasks.
Portable Design
The AMETEK PTC-350 combines professional calibration performance with portable construction.
The instrument weighs approximately:
8.2 kg
Its dimensions are:
362 × 171 × 363 mm
This makes the calibrator suitable for transportation between laboratories and industrial measurement locations.
A protective carrying case is available as an accessory.
The case provides storage space for the calibrator, inserts, reference sensors and additional accessories.
Technical Highlights
| Specification | AMETEK PTC-350 |
|---|---|
| Manufacturer | AMETEK |
| Model | PTC-350 |
| Product type | Professional Dry Block Temperature Calibrator |
| Temperature range | +33 °C to +350 °C |
| Reference ambient temperature | 23 °C |
| Internal reference accuracy | ±0.2 °C |
| Accuracy with external STS-150 | ±0.08 °C |
| Temperature stability | ±0.02 °C |
| Radial homogeneity | 0.02 °C |
| Temperature resolution | 1 °C / 0.1 °C / 0.01 °C |
| Temperature control | Active dual-zone |
| Heating time, 33 °C to 350 °C | 7 minutes |
| Cooling time, 350 °C to 100 °C | 19 minutes |
| Cooling time, 100 °C to 50 °C | 12 minutes |
| Typical stabilization time | 10 minutes |
| Well diameter | 26 mm |
| Immersion depth | 140 mm |
| Insert outer diameter | 25.8 mm |
| Insert length | 150 mm |
| Calibration inserts | Interchangeable |
| Communication interface | USB 2.0 |
| Reference sensor input | Models B and C |
| Sensor-under-test input | Model B |
| Temperature switch testing | Model B |
| Software | JofraCal |
| Operating temperature | 0 °C to +40 °C |
| Storage temperature | −20 °C to +50 °C |
| Relative humidity | 0–90% RH |
| Power supply | 115 V or 230 V AC version |
| Maximum power consumption | 1150 VA |
| Protection rating | IP10 |
| Dimensions | 362 × 171 × 363 mm |
| Weight | Approx. 8.2 kg |
Calibration of RTDs and Pt100 Sensors
The AMETEK PTC-350 is particularly suitable for calibrating resistance temperature detectors.
Typical applications include:
- Pt100 calibration
- Pt1000 calibration
- Industrial RTD calibration
- Precision resistance thermometer calibration
- Temperature probe verification
The temperature sensor is inserted into a suitable calibration insert.
The calibration block generates a stable temperature that can be compared with the temperature indicated by the device under test.
For high-accuracy applications, the PTC-350B or PTC-350C can be used with an external reference thermometer.
The PTC-350B additionally provides integrated sensor-under-test measurement functionality.
Calibration of Thermocouples
The AMETEK PTC-350 can also be used for thermocouple calibration.
Thermocouples are widely used in industrial applications requiring elevated temperatures.
The instrument provides a stable temperature environment for checking thermocouple measurement systems.
The thermocouple is inserted into the calibration block and allowed to stabilize.
Its indicated temperature can then be compared with the reference temperature.
For accurate thermocouple calibration, reference junction compensation and the measurement uncertainty of the readout must be considered.
Calibration of Temperature Transmitters
The AMETEK PTC-350 is suitable for calibrating temperature transmitters.
Temperature transmitters convert temperature sensor signals into standardized electrical output signals.
A common industrial output range is:
4–20 mA
The PTC-350B can measure compatible transmitter output signals using its integrated sensor-under-test measurement functionality.
The temperature is generated by the calibration block.
The transmitter output is then compared with the expected signal at the selected temperature.
This allows the complete measurement chain to be evaluated.
Calibration Service by europascal
Regular calibration is essential for maintaining reliable and traceable temperature measurements.
europascal provides professional calibration services for temperature measuring instruments and calibration equipment.
When the AMETEK PTC-350 is used for temperature sensor calibration, the measurement uncertainty must be evaluated according to the complete calibration procedure.
Relevant uncertainty contributions may include:
- Calibration of the internal or external reference thermometer
- Temperature stability
- Axial temperature distribution
- Radial temperature distribution
- Loading effects
- Sensor immersion depth
- Thermal contact between sensor and insert
- Reference thermometer readout uncertainty
- Sensor-under-test measurement uncertainty
- Measurement repeatability
The uncertainty evaluation should follow the applicable calibration procedure and relevant metrological guidelines.
For professional calibration services and metrological traceability, visit the europascal Calibration Service.
Why Choose the AMETEK PTC-350?
The AMETEK PTC-350 combines accurate temperature calibration with fast heating performance and advanced temperature control.
Its temperature range from +33 °C to +350 °C covers numerous industrial and laboratory applications.
Patented heating technology allows the instrument to reach 350 °C in approximately seven minutes.
Active dual-zone temperature control helps maintain excellent temperature homogeneity.
Temperature stability of ±0.02 °C and an accuracy of ±0.08 °C with the specified external reference sensor provide reliable conditions for precision calibration.
Interchangeable calibration inserts accommodate temperature sensors with different diameters.
Intelligent reference sensors simplify setup and reduce the risk of incorrect calibration coefficient entry.
The PTC-350B configuration provides additional measurement and documentation functions for automated calibration procedures.
For calibration laboratories, pharmaceutical manufacturers, food processing companies and industrial users requiring a professional temperature calibrator, the AMETEK PTC-350 provides an excellent combination of accuracy, flexibility and efficiency.
europascal supports customers with professional temperature calibration equipment, technical advice and calibration services.
Typical Applications for the AMETEK PTC-350
Typical applications include:
- Pt100 calibration
- Pt1000 calibration
- RTD calibration
- Thermocouple calibration
- Precision temperature measurement
- Temperature transmitter calibration
- Temperature switch testing
- Pharmaceutical manufacturing
- Food processing
- Industrial heating systems
- Process instrumentation
- Preventive maintenance
- Commissioning
- Calibration laboratories
- Industrial quality assurance
- Temperature metrology
- Field calibration
The combination of fast heating, excellent temperature stability, active dual-zone control and flexible measurement functions makes the AMETEK PTC-350 a professional solution for demanding temperature calibration applications.
Discover the europascal Calibration Service.
Manufacturer information for the AMETEK PTC-350 can be found on the official AMETEK website.
