Moisture survey analysis appearance cooling water of crude oil is thermostatic control device in a narrow margin

The utility model provides a moisture survey analysis appearance cooling water of crude oil is thermostatic control device in a narrow margin includes: heat band, water -cooling head, auxiliary relay (ZJ1, ZJ2), temperature sensor, temperature controller. Characterized by: the heat band be rising temperature device, the water -cooling head is supplementary refrigerating plant, establish the both ends at the moisture survey analysis appearance cooling water circulation system of crude oil respectively, the cooling water circulation system temperature reaches the temperature controller through temperature sensor, the temperature controller is through auxiliary relay ZJ1's normally open a little (K1), auxiliary relay ZJ2's normal close point (K3) starts or closes the heat band, the temperature controller passes through auxiliary relay ZJ1's normal close point (K2), the normally opening a little of auxiliary relay JZ2 (K4) starts or closes the water -cooling head. The utility model is suitable for a control of th