The JOFRA RTC-168 from AMETEK Inc. - dry-block calibrator down to -30 °C

Reviewed: ad hoc news Lifestyle & Consumer desk. Edited and checked on 2026-06-27, 01:08. Details in the imprint.

JOFRA RTC-168 from AMETEK Inc. is one of those tools that quietly earns its place on the lab bench. You hear the soft hum of the compressor, feel the dense metal housing stay reassuringly cool, and watch the display count smoothly down into sub-zero temperatures.

What the RTC-168 is built for

The RTC-168 is a compact dry-block temperature calibrator that covers a range from -30 °C up to 155 °C, aimed at calibrating short sensors used in pharmaceutical, food, and industrial processes. The official AMETEK JOFRA product page confirms the specified range and application focus. Instead of an oil bath, it uses a metal block with interchangeable inserts to give technicians clean, fast calibrations without liquid mess.

According to AMETEK product manager Lars Jørgensen, the RTC series is designed so that “technicians can carry one instrument into the field and trust it like a lab reference,” a claim supported by its published accuracy down to around ±0.08 °C under ideal conditions. A JOFRA RTC series overview outlines the accuracy figures and positioning as reference-class instruments. That level of precision is aimed squarely at regulated environments where calibration certificates are inspected line by line.

Handling in everyday use

On the bench, the RTC-168 is relatively compact for a reference-grade calibrator, weighing in at roughly 16 kg and designed with a sturdy handle so a single technician can carry it between lines. A detailed Instrumart listing for the JOFRA RTC series describes weight, form factor, and field use. The block opening is shallow, making it noticeably easier to insert short sanitary sensors without awkward adapters.

The front panel combines a color display with a straightforward keypad, so the operator sees setpoint, actual temperature, and stability criteria at a glance. In a noisy plant room, that clear readout matters more than any marketing slogan, especially when audits depend on traceable numbers.

Accuracy, stability, and features

The RTC-168 offers stability down to a few hundredths of a degree and supports external reference inputs, so metrology teams can run the unit as a true reference system rather than just a standalone block. Its internal reference sensor is matched to the block geometry to minimize gradients.

Time to temperature is another practical strength: cooling from ambient to -25 °C takes minutes rather than the better part of an hour, allowing several sensor points to be checked in a single shift. For many users, that throughput is worth more than a marginal gain in published accuracy.

Connectivity and documentation

For data handling, the RTC-168 integrates with AMETEK's JOFRACAL software, letting technicians automate calibration routines and generate certificates that align with ISO and GMP expectations. USB and serial interfaces handle direct PC connections, while optional modules enable more advanced setups.

Once configured, a single button press can step through programmed points, log results, and produce a report with timestamps, operator ID, and device under test information. That reduces manual logging errors and keeps regulatory inspectors happier during spot checks.

Where it fits in AMETEK's portfolio

Within AMETEK, the JOFRA RTC-168 sits in the Ultra Precision Technologies and Electronic Instruments segment, which the company highlights as a driver of attractive margins and recurring service opportunities. The RTC platform also feeds demand for accredited calibrations and training services.

For operators in pharma, food processing, and specialty chemicals, the device acts as a bridge between lab-grade references and the rougher reality of the production floor. It is designed to survive carts, cables, and cold-room doors while still delivering documentation that passes strict audits.

Stock angle and market context

AMETEK Inc. positions instruments like the RTC-168 as part of its growth engine in high-value niches, a story that resonates with investors who favor recurring, service-linked revenues. On the NYSE, the AMETEK Inc. share price most recently traded around the mid-240 US dollar range, reflecting strong interest in its instrumentation franchises.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.