Measuring device for seawater temperature

The utility model discloses a measuring device for seawater temperature, specifically comprising an unbalance bridge circuit unit, a constant current source generation circuit unit, a voltage follower circuit unit and a filter amplifying circuit; the input end of the unbalance bridge circuit unit is connected with the anode of a direct current voltage through a resistor R8; the output end of the unbalance bridge circuit unit is connected with the voltage follower circuit; the output end of the constant current source generation circuit unit is connected with the unbalance bridge circuit unit; the voltage follower circuit unit is connected with the filter amplifying circuit through a resistor R9 and a resistor R10; and the input end of the constant current source generation circuit unit is connected with a +5V power supply. The utility model has the characteristic of high sensitivity, excellent stability and long service life; the measuring precision is much higher than the traditional thermoelectric pair or pressure type thermodetector; and the measuring device has obvious technical advantage within the conventional temperature measuring range of seawater (between -2 DEG C and 30 DEG C).