Liquid leak detector E series

High chemical resistance Use in category 2 (Ex-zone 1) with ER-145… Line monitoring for cable short-circuit / cable break Description Conductive electrodes type EF2...5 are approved by the “DIBt” (German Institute for Structural Engineering) as liquid level limit switches for the overfill protection of containers for storing water-endangering liquids Further product information The EF2...5 fittings are made of PE, PPH, PVC or PTFE, depending on the requirements. The electrode rods are made of stainless steel 1.4571, Hastelloy C, titanium or tantalum. This makes the EF2...5 conductive electrodes suitable for use with highly aggressive media. The electrode relays ER-107..., ER-217... or ER-145... (intrinsically safe control circuit), approved for overfill and leakage detection (Z-65.13-100 and Z-65.13-405) supply a measuring voltage that causes an operating current to flow through the signal line via the resistor built into the conductive electrode. If the conductive medium rises to the height of the electrode tips of the level detector, a circuit is closed. This causes the potential-free output contacts on the electrode relay to switch over. To cope with the different conductivities of the liquids, the electrode relays ER-107..., ER-217... or ER-145... can be supplied in two different response ranges (1...30 k / 6...90 k). Within these ranges, the response value can be adjusted by means of a potentiometer. Alternatively, an evaluation circuit (ET450/451) can be integrated directly in the connection head. If there is a line interruption, the output contacts are switched over (as in the case of an alarm caused by reaching the response level or voltage failure).