84870700

The HNM series Control Relay designed to monitor the levels of - conductive liquid (HNM). The HNM relay takes its measurements by means of resistive probes. It actuate their output relay during emptying or filling of a tank. HNM relays control levels of conductive liquids. The principle is based on measuring the apparent resistance of the liquid between two submerged probes. When this value is below the preset threshold displayed on the front face of the unit, the relay changes state. To avoid electrolytic phenomena, an AC current runs across the probes. A rotary switch on the front face can be used to select the desired function and sensitivity range. High and low-level data is produced by 3-wire output discrete sensors. A green LED indicates the presence of the supply voltage. A yellow LED indicates the status of the output relay. A yellow LED flashes during the time delay.

• Control of one or two levels
• Filling or emptying function
• Control by a resistive level probe

Applications

Industrial, Automation & Process Control, Clock & Timing