TEMPERATURE CALIBRATORS AMETEK PTCt Series
The JOFRA PTCt series is a new, improved generation of dry-block temperature calibrators, building on the proven performance of the PTC platform while introducing a new digital architecture and a customized user interface.
PTCt combines established thermal performance with a modern user interface, enhanced visualization and extended connectivity, creating a common platform designed for both laboratory and field calibration.
The series is developed to support consistent workflows, improved documentation and software integration.
The series includes the following models:
• PTCt-125 (Cooler): -90 … +125°C
• PTCt-155: -30 … +155°C
• PTCt-350: +33 … +350°C
• PTCt-425: +33 … +425°C
• PTCt-660: +33 … +660°C
Each temperature calibrator is available in several configurations (A, B, C), ranging from basic versions to fully equipped models with signal inputs and an external reference sensor.
Advantages:
• Wide operating range: -90°C to +660°C
• High accuracy: up to ±0.06°C
• Excellent stability: up to ±0.01°C
• Fast heating: 350°C in approximately 7 minutes
• Active dual-zone temperature control for superior uniformity
• Portable, robust and easy-to-transport temperature calibrator
• Modern full-colour touchscreen interface
• Graphical visualization of calibration stability and progress
• Simultaneous testing of 2 temperature sensors
• Intelligent STS Plug & Play reference sensors
• Connectivity: Wi-Fi, LAN, USB, remote access
• Free JofraCal software for automation and certificate generation
• Compatibility with RTDs, thermocouples, transmitters and thermostats
• Immunity to mains voltage fluctuations (MVI)
• ISO 17025 certification and EURAMET compliance
Technical Specifications:
| Parameter | Value |
| Type of temperature calibrator | Dry block |
| Total generated temperature range | from -90 to +660°C (from -130 to 1220°F), with 5 available models |
| Calibrator accuracy over the entire range | ±0.06°C / ±0.11°F over 12 months of continuous operation (PTCt 155) |
| Temperature calibrator stability | ±0.01°C |
| Radial uniformity | 0.01°C |
| Axial uniformity | 0.01°C |
| Number of sensors tested simultaneously | 2 temperature sensors (transducers) |
| Resolution at all temperatures – user selectable | 1°; 0.1°; 0.01° |
| STS sensor temperature measurement block (built-in) | Accuracy (12 months): ±0.003% rdg. |
| STS Reference Sensor Accuracy | Stability ±0.014°C over 12 months |
| Repeatability | 0.004°C |
| Hysteresis | 0.01°C |
| Sensor immersion depth in the insert | 160 mm |
| Integrated measurement inputs | RTDs (2, 3, 4 wire) and thermocouples (all standard types), transmitters and temperature switches (switch test) |
| Display | Full-colour touchscreen with integrated keyboard and graphical visualization of calibration progress. Functions include: temperature setting, parameter configuration, Auto Calibration (work orders), work-list planning, Autostep, Switch Test |
| Connectivity | Wi-Fi; PC; Remote Access via Standard Web Browser (optional RG package); quick setup via QR code |
| Communication interface | USB 2.0 device port; LAN Ethernet |
| Power consumption | Max. 400 W – 1150 VA |
| Weight of PTCt calibrator | 8.2 kg – 14 kg depending on model |
| Temperature Calibrator Model | Temperature Range | Accuracy (STS sensor) | Stability | Typical Applications |
| PTCt-125 (Cooler) | -90 … +125°C | ±0.07°C | ±0.03°C | Cryogenic applications, laboratory, low-temperature sensors |
| PTCt-155 | -30 … +155°C | ±0.06°C | ±0.01°C | HVAC, food industry, pharmaceutical |
| PTCt-350 | +33 … +350°C | ±0.08°C | ±0.02°C | General industrial processes |
| PTCt-425 | +33 … +425°C | ±0.13°C | ±0.02°C | Chemical industry, energy |
| PTCt-660 | +33 … +660°C | ±0.15°C | ±0.04°C | High-temperature applications, oil & gas |
