Simple on/off control of water or effluent pump up, pump down, low or high liquid level alarm using stainless steel electrodes such as multi-electrode probes (eg. FOGRod from www.waterauto.co.uk), stainless steel rods etc. 
 
Slimline DIN rail mount. DIMENSIONS:  L 90mm x H 64mm x W 18mm
 
24V-230V AC/DC Supply Voltage with green LED lit when power on.
 
Relay Output 10A/AC1 with red LED, lit when relay ON. Adjustable relay output time delay  (0.1 - 10 seconds).  Pulses 1s on 1s off when delay timer counting down.
 
Adjustable  sensitivity for different liquid conductivity levels (5K to 100K).
 
Galvanically separated AC/DC 24-230V supply voltage for super safe operation