A. Chatterjee et Sc. Mukherjee, PRECISION UNIVERSAL TEMPERATURE (-200-DEGREES-C TO -DEGREES-C) CONTROLLER WITH FAST SOLID-STATE ON-OFF SYSTEM(200), International journal of electronics, 75(4), 1993, pp. 771-776
A simple, rugged, reliable, low cost temperature display-cum-controlle
r has been designed and constructed using standard integrated circuits
and a 3 1/2 digit LED display. The controller, utilising semiconducto
r controlled rectifiers as fast solid state on-off switches capable of
maintaining the set temperature constant within the temperature range
-200-degrees-C to +200-degrees-C with a resolution of +/-0.05-degrees
-C. A thermocouple (specifically, a copper-constantan type) sensor has
been used because of its fast response time and tolerance of high mag
netic fields.