AMETEK Products




Fast and convenient marine temperature calibrators

M arine
T emperature
C alibrator

The new MTC series of portable temperature calibrators from JF INSTRUMENTS makes it very easy to maintain correct readings for all your temperature monitoring devices. The dry-block design does not use any hazardous hot liquid, has a larger temperature range and heats up and cools down much faster than a traditional liquid bath.

The JF INSTRUMENTS MTC series of dry-block calibrators has been designed for much easier true temperature calibration in the field, leading to reliable results. The simple operation and the automatic functions have been carefully selected for ease of use. This has resulted in a fast, simple and efficient temperature calibrator without compromising quality. Reach 320C (608F) in just 4 minutes.

  • Interchangeable inserts
  • Multi-hole insertion tubes
  • MVI Mains Variance Immunity
  • Automatic switch test
  • Multi information display
  • Safty banana bushings
  • Auto stepping
  • Stability indicator
  • Count down timer (shows when unit is stable)
  • Programmable maximum temperature
  • Fast simulation/training mode
  • Re-calibration from keyboard
  • RS232 and JOFRACAL calibration software

Model and temperature range
MTC-140 A..........-17 to 140C (-1 to 284F)
MTC-320 A..........50 to 320C (122 to 608F)
MTC-650 A..........50 to 650C (122 to 1202F)


See others dry-block calibrators:


The MTC series features a large backlit display showing a lot of useful information at the same time: The set value and the true temperature, the status on the thermo switch test input, a count- down time before the temperature is stable and a big check mark when it is stable. To save time use the automatic switch test. The MTC series will find the open and close temperatures on a thermo switch and calculate the dead band. The MTC series also features an auto-step function. Using this function you may stay in the control room and monitor the temperature reading while the calibrator automatically steps through a number of pre-programmed temperatures located next to the sensor.

  Three models - The JF INSTRUMENTS MTC series consist of three different models differ in temperature. All units offer similar features and the large, backlit LCD display panel, which is easy-to-read even in well-lit areas. A rugged, slim-line, aluminium outer casing with die-cast top and bottum protects the MTC series of dry-blocks.

Well - optimized for speed - The special designed heating block profile reduces the mass so it heats up and cool down very quick. The design still offers good stability and accuracy.

High flexibility - You are not limited by fixed holes. Interchangeable insertion tubes are used to match the diameter of your sensor-under-test. Also multihole inserts are available.

  Switch test - Fully automatic test of thermo switches. The calibrator will find the closing and the opening temperatures and calculate the hysteresis. This makes you save time and leaves you free to concentrate on other things while the test is running.


  Auto step - The calibrator will automatically change to the next programmed value. This allows the calibrator to be placed anywhere in the process while you monitor the output from the sensor-under-test in the control room.
Easy maintenance - If adjustment of the calibrator is needed, use the built-in routine. No need for a computer or a screwdriver. "Calibration Date" is shown each time the instrument is switched on.

  MVI circuitry - The MVI technology removes the stability problem caused by an unstable mains supply. This is very often a problem in production environments with large electric motors, heating elements, etc. cycling on and off.

More about MVI

  Stability indicator - Clear audio and visual indication in the display when the calibrator is stable.
  Simplified calibration documentation - All JOFRA MTC series calibrators are delivered with an RS232 serial interface and the JOFRACAL calibration software.
JOFRACAL software presents the means for an entirely automatic calibration of sensors and a semi-automatic calibration of the complete process loop through the use of a PC.

More about JOFRACAL.

Key specifications:
specified at 23C 3C MTC-650 A MTC-320 A MTC-140 A
Temp. range 50 to 650C 50 to 320C -40 below ambient to 140C
Heating time 10 min. 4 min. 15 min.
Immersion depth 115 mm 115 mm 110 mm
Accuracy 0.9C 0.5C 0.5C
Stability 0.1C 0.1C 0.05C
Resolution 0.1C 0.1C 0.1C
Read-out C and F C and F C and F
Standard delivery

MTC instruments, 110 or 230 VAC 50/60 Hz  - 1 x insertion tube, multihole - Aluminium style carrying case - tool for insertion tube - test cables - mains cable - user manual - traceable certificate.
Optional extras Insertion tubes for other dimensions of probes

PRODUCT INFORMATION (Specification sheets)
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JF Instruments - - - - MTC Series - - - - Specification Sheet in English


Insertion tubes for JOFRA temperature dry-blocks  -  - - - -  Accessory sheet in English


User Manual JF Marine Instruments MTC-140/320/650 A

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