TRITON CONTROLS - FLOAT SWITCHES LR08, LRW8 NON MERCURY LEVEL REGULATORS Float Switches are inexpensive and efficient liquid level detectors. They are simple to install, and designed for trouble free operation over a long life. The LR08 is a plastic float switch using either a PVC or synthetic rubber 3 core cable. Actuation is via a roller ball and micro-switch arrangement within the switch thereby eliminating all heavy metals from this version. Construction The unit comprises three major components: 1. The float chamber houses the micro-switch arrangement, totally sealed within a polypropylene casing, with a single pole double throw action. 2. The three-cored cable, connected to the micro-switch assembly inside the float chamber, is sheathed in CPE (chlorinated polyethylene) synthetic rubber or PVC. This cable is supplied in three standard lengths, 5 metres, 10 metres and 20 metres 5% of the length quoted. 3. Two versions are available: LR08, LRW8 a. LR08 The float is a standard buoyant type and an optional stabilizing weight may be fixed at any point on the cable. b. LRW8 Where the counter weight is inside the polypropylene chamber, hence giving the float a self tilting action. Mounting Whilst no hard and fast rules apply to the mounting of these units, the lead should be supported in an enclosed vessel, and in an open vessel it is advantageous to clip the lead to the side, especially if excessive turbulence is experienced. To obviate the effects of rapid switching conditions that would result if such turbulence is experienced, it is advantageous to use a maintaining circuit which both safeguards the micro-switch and cuts out any chatter in the starters of associated pumps etc ANTI VIBRATION MOULDING MICROSWITCH CABLE GLAND CPE SYNTHETIC RUBBER CABLE 100 STEEL BALL 174LR08 - NON MERCURY FLOAT SWITCH Method of Operation Contact rating: 250V 15A, non-inductive. 250V 10A, inductive. 1.3 HP The micro-switch assembly inside the float, axially mounted in line with the weight, changes contacts NOTE : Local regulations may limit the voltage. according to the floats position, as in the diagram below. Therefore as the liquid level drops or rises Max. temperature 70 C slowly, a pump or flow control suitably connected, can be switched in or out to maintain an average Max. submerged depth 20 metres level of the liquid. By connecting only one side of the switch, the unit can be also used to fill or empty Compressive Strength 482 KN/m (70 lbf/in) the tank as required. Operational in specific gravities from 0.8 to 1.3 Dimensions, in mm, do not take into consideration any lateral swing of the cable. Chemical Resistance CONTACT BETWEEN BROWN 45 AND BLACK LEADS Against Rating Lubricants Fair Diesel oil & petrol Poor 300mm MIN. Vegetable & animal fats Good Water Absorption Good 330mm MIN Oxidation Good OPERATING Ozone Good DEPTH Sunlight Good CONTACT BETWEEN BROWN AND BLUE LEADS 45 Dilute Acids Good Alkalis Good Alcohols Good OPERATING POINTS ARE APPROXIMATE ONLY Salt water Good A comprehensive list of chemical resistances is available on request. Connection diagram for automatically emptying tank When ordering please specify part numbers. BLACK LEAD BROWN LEAD Type Part Number Weight (Approx.) BLACK LEAD 5 metre cable LR08-L05M 0.75 Kg COIL FOR MAX 250V (AC) 10 metre cable LR08-L10M 1.25 Kg 20 metre cable LR08-L20M 2.25 Kg 5 metre cable LRW8-L05M 1.30 Kg N L3 L2 L1 MAINS SUPPLY B C A 10 metre cable LRW8-L10M 1.80 Kg TO PUMP MOTOR 20 metre cable LRW8-L20M 2.80 Kg Connection diagram for automatically refilling tank BROWN LEAD BLUE LEAD BLUE LEAD COIL FOR MAX 250V (AC) N L3 L2 L1 MAINS SUPPLY A B C TO PUMP MOTOR