Zedflo Isotech Isis low-temperature dry block calibrator

The Isotech Isis dry block calibrator from Zedflo offers operation to temperatures as low as -100°C. It is now possible to calibrate temperature sensors such as RTDs, thermocouples and thermistors at ultra-low temperatures without the need for a liquid bath.

Unlike liquid baths, the Isis requires no costly or hazardous fluids and offers much greater portability and flexibility. This will be of particular value to calibration engineers working on site with low-temperature freezers, as encountered in pharmaceutical, aeronautical and food environments.

The minimum operating temperature is lower than stirred liquid calibration baths and users in laboratories can also benefit by avoiding the ongoing need (and costs) for expensive fluids.

The maximum operating temperature is 40°C, a little higher than the minimum operating temperature of Isotech hot blocks. This permits covering temperature ranges from -100 to 650°C or higher with two Isotech blocks.

The Isis has a large insert, at 35 mm diameter by 160 mm deep, allowing for calibration of multiple sensors. For thermal validation applications, there is also an insert with pockets for a reference probe (6.5 mm) and 20 3.5 mm pockets for thermocouples. This allows a single calibration cycle to validate up to 20 probes at a time.