![Hygrometer with 3 Stage Thermoelectric Cooler](https://d27wgn5g4t3wja.cloudfront.net/img/5c1f6239-1422-08df-aa6e-62a2262f8fd5/63922.png)
Hygrometer with 3 Stage Thermoelectric Cooler
CR - 4 - Buck Research Instruments, LLC
The CR-4 is a chilled mirror hygrometer that uses a 3-stage thermoelectric cooler (TEC) to enable frost point measurements of as low as - 65C, under favorable ambient conditions. Depending upon ambient temperature, it can measure dew points as high as 60C.