I. Introduction
TTransformer oil temperature indiactor model BWY-804(we call 804 temperature
controller) is new product which is developed based on the temperature controller
model BWY802, 803. This kind product is fit for the measurement and the controller
of the medium and man-sized transformer oil surface.
804 temperature controller has the following new characteristic:
1. Bigger usage range
According to request of the intellectualized controlling with no people, this
controller is able to output the following controlling signal:
(1) Pt100 platinum resistance
(2) DC4-20mA
(3) RS232,RS485 connection
2. Have 4 team switches, and the switch can be set for the full temperature range,
which used for controlling, alarm when the temperature is higher than the setting
temperature, disconnection of the knife switch when the temperature is higher than the
setting temperature.

