The Hanna Instruments HI 9934-1 is a Wall Mounted TDS Controller with Proportional Fertilizer Dosing that also provides an isolated output signal which is user selectable between 0-20 or 4-20 mA. HANNA instruments four-ring TDS probes with incorporated temperature sensor and DIN connector can be quickly attached to the controller. Readings are automatically compensated for temperature variations in the 0 to 50° C ( 32 to 122° F) range. The extractable terminal wiring is through the side of the meter with washers and grommets. The compartment containing the connections is enclosed behind a fire-retardant ABS panel.
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