CTC-155 Compact Temperature Calibrator, -25°C to 155°C

The CTC-155 is JOFRA's compact industrial dry-block for -25°C to 155°C at 23°C ambient (down to -39°C at 0°C ambient). On its internal reference it holds ±0.3°C, and with an external STS-102 or STS-120 reference sensor on the C version ±0.2°C; stability is ±0.04°C and the holes agree within 0.03°C.

It weighs 5.5 kg (12.1 lb), with the handle away from the heat zone, and gives 120 mm of immersion with the insulation plug in a 26 mm well. It heats from 23 to 155°C in about 13 minutes and cools to -25°C in about 16. A dry-contact switch input tests thermostats and switches, and USB feeds JOFRACAL.

CTC versions: A is the basic model; C adds the external reference sensor input. The Configure tab builds the exact order code with list pricing from AMETEK's 2026 USD price list. Quote-first: the order code comes to Valley for confirmation before anything is ordered.

The Jofra CTC-155 Compact Temperature Calibrator, -25°C to 155°C CTC155 is manufactured by Jofra. Valley Instrument Service is an authorized Jofra dealer offering full sales support, NIST-traceable calibration, and expert technical assistance.