Low Temperature Cryostat Bath made by double walled contruction inner made of thick guage stainless steel 304Q Et exterior made of G.I sheets powder coated. Cooling is by hermetically sealed compressor with CFC free refrigerant. Heating is by specially designed heaters. temperature controlled by Microprocessor based Auto tune PID digital temperature controller with PT 100 as sensor. temprature Range: 0 deg c to ambient. Motor with Pump for better temperature uniformity Et external recirculation.