Nimbus technologies offers simple controller. Features: iput: k, j, pt, r, s, n, t, e, b, dc linear; output : relay [250v/5a], dc24v for ssr drive, 4-20 ma; control mode: on/off, p, pd; accuracy: 0.3 per cent full scale; power consumption: relay [6w], ssr [5w]; input impedance: 20 m ohm 500v dc; and high/low alarm: 10 per cent full scale adjustable.
