economical temperature controller 1. New algorithm 2. PID automatic control 3. several alarm mode settig. 4. several input economical temperature controllerFeature1. 3digit display, two alarms.2. operation easy, competitive price 3. TC/ RTD/ Voltage/ Ampere input.4. strong anti-interference ( arrives to 4 KW),adapt to modulate frequency conversion velocityand so on bad industrial environment.5. ...