Water Activity Meter EZ-200

The 4K series closed-circuit thermostats offer a wide temperature range from 4 K to 325 K (500 K or 800 K optional). Samples are kept in a vacuum and cooled by heat conduction. They feature ample sample space and can be combined with a variety of sample holders to test a variety of thin films, bulk materials, powders, and liquids. Four optical windows are standard.

The 1.5K series closed-cycle cryostats offer continuous temperature control from 1.5K to 325K. They feature ample sample space and can be fitted with a variety of sample holders, enabling testing of a wide range of thin films, bulk materials, powders, and liquids. The aluminum vacuum housing and radiation shield feature a segmented design for fast sample changes. Equipped with a closed-cycle refrigerator, the built-in heater and temperature sensor work in conjunction with an external thermostat to achieve temperature control.

The continuous flow thermostat can achieve a wide temperature range: from 4K to 450K, and can reduce the temperature to ~2K. The sample is in a vacuum and is cooled by heat conduction. The sample space is large and can be equipped with a variety of sample holders to test various thin films, blocks, powders and liquid samples. The refrigerant consumption is low. Using liquid helium to cool from room temperature to 5K only consumes 0.4L of liquid helium, and using liquid nitrogen to maintain 80K consumes 0.1L/h. It comes standard with 4 optical windows.

Liquid nitrogen storage cryostat offers a wide temperature range from 78 K to 500 K (800 K optional, with pump-down down to ~65 K). Samples are cooled in a vacuum using heat conduction. The large sample compartment accommodates a variety of sample holders, allowing testing of a wide range of thin films, bulk materials, powders, and liquid samples. The 0.4 L liquid nitrogen storage capacity maintains low temperatures for up to 5 hours, and liquid nitrogen can be refilled without disrupting the experiment.