A Temperature Sensor for Temperature Integration in the Field
C. F. Green, Peter N. Schaare, C. N. BATES · Journal of Experimental Botany · 1983
A temperature sensor for use with millivolt type integrators was based on a temperature dependent current source. The design incorporated the facility to vary the base temperature above which integration took place. Response was linear giving an output sensitivity of 0.27 mV/°C. The unit was powered by four 1.25 V nickel-cadmium cells.