If you ever thought about having the best equipment available and didn't really know what the best is, then this page is for you. By chance, if you already know that Jofra™ stands for quality, reliability and simply the best, then you can understand why "Glanford Electronics" has been appointed distributors of their high quality products.

Throughout the range of equipment that Ametek® Jofra™ manufacture, each item goes through a rigorous test procedure to ensure that high quality is maintained.

There is a wide range of temperature, pressure, and calibration products, with software to enhance your records at any level.
What ever your needs, "Glanford Electronics" can supply the advice and equipment to bring your testing and calibration procedures up to the high level you may have thought unattainable.
Please contact us and see what the Jofra™ range can offer for you.

AMETEK® JOFRA™ dry block temperature calibrators are recognized world-wide for their dependability, accuracy, stability and quality. A dry-block temperature calibrator is basically very simple, it heats up or cools down a metal block and keeps the temperature stable. You place your sensor-under test in the metal block. This design provides many advantages, especially when compared with the more traditional liquid baths.

Heats up and cools down much faster No hazardous hot liquids Much wider temperature ranges

Physically small and light Designed for industrial applications Programmable for easier calibrations

The new JOFRA ATC-125 ultra cooler from AMETEK Calibration Instruments is the world's first dry-block calibrator capable not only of reaching -90°C but to have a temperature range of 215°C (-90 to 125°C). Featuring patent-applied for Free Piston Stirling Cooler (FPSC) technology for cooling, together with a special heating element, the ATC-125 offers high accuracy and excellent stability. More importantly, its extremely fast heating and cooling makes a 5 point calibration up to 5 times quicker than with an equivalent liquid bath. It can be used equally in a laboratory or a factory environment. Ideally suited to calibration applications in the pharmaceutical, food, food ingredients, hospital and marine industries, the ATC-125 can be used to perform fully automatic calibration routines without the need for a PC. However the unit is also fully compatible with PC operation and is supplied complete with JOFRACAL calibration software.
The patent-applied for FPSC is a Stirling heat pump in a lightweight (290 g) compact unit that is up to 6 times more efficient than more commonly used Peltier coolers. It uses a small amount of helium gas as the heat transport medium instead of conventional refrigerants such as CFCs, HFCs and Freon, making it environmentally friendly. Since it is a dry block calibrator, no expensive or hazardous (flammable) liquids are used which may require special ventilation. In addition, the entire temperature range can be reached without liquid changes.

A field dry-block calibrator that combines the demands for small physical dimensions with high accuracy and stability.
The ITC series employs the slim and rugged design of the CTC series. This series also features the intuitive user interface, the clear LCD display, and the functionality that is used in the successful CTC series. However, the ITC is designed with the state-of-the-art dual-zone heating block and MVI circuitry that has been adopted from the ATC series. The MVI circuitry ensures stable temperatures even when the mains supply is unstable. The ITC series is designed for both on-site and maintenance shop use. The applications are generally critical process control but can vary based on calibration and testing requirements. The ITC series dry-block calibrators are available in 3 different temperature ranges and all models are equipped with RS-232 serial communication capabilities. The units are supplied with the JOFRA CAL-TEMPERATURE soft-ware package.

Jofra Marine Temperature Calibrators. The MTC series of portable temperature calibrators from JF Instruments facilitates correct readings on all of your temperature monitoring devices. The MTC dry-block design does not use any hazardous hot liquid and heats up and cools down much faster than traditional ways of calibrating temperature sensors on a vessel. You can reach 320°C (608°F) in just 4 minutes and do it safely.

AMETEK continues to develop new techniques to improve performance, accuracy, convenience and functionality of the well-known JOFRA calibration products. By doing so, we maintain our position as the leading worldwide manufacturers of temperature dry-block calibrators.
The new PTC calibrator comes in three different models, A, B and C
PTC-A professional temperature calibrator
PTC-B professional temperature calibrator with input for reference sensor and sensors-under-test
PTC-C professional temperature calibrator with input for reference sensor
High accuracy Down to ±0.06°C (±0.11°F) using the external reference sensor. 4-wire True-Ohm- Measurement technology applied
Excellent stability 0.01°C

AMETEK continues to develop new techniques to improve performance, accuracy, convenience and functionality of the well-known JOFRA calibration products. By doing so, we maintain our position as the leading worldwide manufacturers of temperature dry-block calibrators. We are proud to introduce our new top model RTC (Reference Temperature Calibrator), which is no exception to the above and even more sophisticated than any existing calibrators.

AMETEK continues to develop new techniques to improve performance, accuracy, convenience and functionality of the well-known JOFRA calibration products. By doing so, we maintain our position as the leading worldwide manufacturer of temperature dry-block calibrators.
The new RTC calibrator comes in three different models A, B, and C.
RTC-A reference temperature calibrator
RTC-B reference temperature calibrator with input forr eference sensor, DLC sensor and sensors-under-test
RTC-C reference temperature calibrator with input for reference sensor and DLC sensor

AMETEK continues to develop new techniques to improve performance, accuracy, convenience and functionality of the well-known JOFRA calibration products. By doing so, we maintain our position as the leading worldwide manufacturer of temperature dry-block calibrators.
The new RTC calibrator comes in three different models A, B, and C.
RTC-A reference temperature calibrator
RTC-B reference temperature calibrator with input forr eference sensor, DLC sensor and sensors-under-test
RTC-C reference temperature calibrator with input for reference sensor and DLC sensor

AMETEK continues to develop new techniques to improve performance, accuracy, convenience and functionality of the well-known JOFRA calibration products. By doing so, we maintain our position as the leading worldwide manufacturer of temperature dry-block calibrators. We are proud to introduce our new high temperature model RTC (Reference Temperature Calibrator), which is no exception to the above and even more sophisticated than any existing calibrators.
The new RTC calibrator comes in three different models A, B, and C.
RTC-A reference temperature calibrator
RTC-B reference temperature calibrator with input for reference sensor, DLC sensor and sensors-under-test
RTC-C reference temperature calibrator with input for reference sensor and DLC sensor
Download the data sheet for full details.

The RTC700 A/B/C calibrators are supplied with Multihole insert and trolley style case.

The RTC 156 & 157 A/B/C calibrators are supplied without a case or any inserts.
The accessories should be ordered as separate items.
We have listed some of the more common requirements in this accessories section. When ordering via our webshop, multiple items can be ordered as required.
For full details we recommend downloading the "Ametek Jofra RTC156 - 157 Reference Temperature Calibrators" pdf from our download page.