Blue Diamond S12-002 Temperature SensorThe Blue Diamond S12-002 Temperature Sensor is a smart, solid-state accessory for MicroBlue and MaxiBlue condensate removal pumps. Rather than relying on a water float switch or reservoir, it uses dual thermistor probes to detect when your air conditioning unit is actively cooling — automatically activating the pump the moment condensate begins to form.How It Works Dual Thermistor Probes: One probe is placed at the air inlet, the other at the air outlet (heat exchanger) of the AC unit. The 5°C Rule: When the AC starts cooling and a temperature difference of more than 5°C is detected between the two probes, the sensor assumes the unit is running and automatically switches the pump on. Automatic Shut-off: Once the AC stops and the temperature difference drops below 5°C, the pump runs briefly to clear any remaining water, then shuts off. Key Features No Moving Parts: Thermistor sensing is solid-state — highly reliable with no risk of clogging from dust or algae. MicroBlue & MaxiBlue Compatible: Plugs directly into the accessory port of compatible Blue Diamond pumps. 2M Lead Length: 2 metre (6.5 ft) cable easily reaches from the pump to the AC inlet/outlet vents. DIN Plug Connection: Simple, secure plug-and-play connectivity. Technical Specifications Feature Specification Compatibility MicroBlue, MaxiBlue Sensor Type Thermistor Sensing Dimension / Lead Length 2m (6.5 Feet) Connection DIN Plug