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Calorimeters & Sensors

Measure accurately with RESOL and optional Grundfos Direct Sensors™.

Solar Hot Water sensors at operating temperatures (68 ... 176 °F) must measure as accurately as possible in order to ensure that any measurement error of sensors and controller does not exceed 3.6 or 5.4 °Ra.

How RESOL Sensors Work: The sensors contain a material that changes its electrical resistance in proportion to the temperature change. The controller measures the resistance and calculates the temperature of the sensor element.

For Example: Pt1000 is a platinum (Pt) sensor with a resistance of 1000 Ω at 32 °F.

How to Choose the right Sensor: Three different sensor types are available: immersion (well) sensors, clip-on and bolt-on sensors. For each sensor product, options are available for diameter (Dim, L1, L2), Cable Material (Silicone, PVC, Pur) and Temperature Range.

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