Magnetic Horizontal Level Switches
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Technical Datasheet Magnetic Horizontal Level Switches For Marine applications Key Features  Operates in almost every liquid Tough, rugged design for long life in aggressive environments Magnetically coupled No glands or linkages that could cause leaks Series Overview Product applications Pump control duty Dirty Liquids Hazardous Area approved versions can be fitted to Zone 0 vessels with process temperatures up to 210°C. Other products Other products we can offer :  How can we help you? Delta Mobrey offers fast, efficient and knowledgeable support when and where you need it. Please visit our website at www.delta-mobrey.com to find your local support centre or call us on: +44 (0)1252 729140 Model: Marine When the process liquid level is below the switch point, contacts B-B are made and contacts A-A are open, but if the liquid level is above the switch point, contacts A-A are made and contacts B-B are open. Magnetic Horizontal Level Switches The Mobrey magnetic horizontal float switch is ideal for high and low liquid level alarm, and pump control duties. It is designed to open or close a circuit as a changing liquid level with

How to order Instrument can be configured by selecting codes representing the desired features from the tables that follow. The chart below, describes how the model code is built up. For assistance in configuring a switch that best suits your needs, please contact your local sales office. S Base Model Table 1 Flange (head) Table 2 Switch Mechanism Table 3 Cable Length Model: Marine Magnetic Horizontal Level Switches

Horizontal float switch Marine, hoseproof, aluminium bronze wetside, no cable fitted, Mobrey ‘A’ flange, 261 psi (18 bar) Marine, submersible, aluminium bronze wetside, MICC cable fitted, Mobrey ‘A’ flange, 261 psi (18 bar) Marine, submersible, aluminium bronze wetside, CSP cable fitted, Mobrey ‘A’ flange, 261 psi (18 bar) Marine, submersible, stainless steel wetside, MICC cable fitted, Mobrey ‘A’ flange, 261 psi (18 bar) Marine, hoseproof, stainless steel wetside, no cable fitted, Mobrey ‘A’ flange, 261 psi (18 bar) Marine, submersible, flameproof, aluminium bronze wetside, CSP cable...

Switch Type Code Aluminium bronze – (code B is required for S179 and S189 models) Stainless steel with 10 ft. (3 m) of fitted cable – (code L is required for S163 model) Aluminium bronze with 10 ft. (3 m) of fitted cable – (code BL is required for S03, S195, S183, and S187 models) Float (All ratings at T room) (4) Model: Marine Switch type General purpose high/low alarm, 316 SST, min. SG 0.65, 500 psi (34.5 bar) Horizontal variable differential for pump control/alarm, 316 SST, min. SG 0.72, 500 psi (34.5 bar) Horizontal variable differential for pump control/alarm, 316 SST, min. SG 0.85,...

TDS-MHLSM-C: MAY 2023 Cable Length (required only if a cable is fitted) The maximum process temperature is dependent on the flange (head), switch mechanism, cable (if fitted), and float options chosen. See Table 7 below for the IP rating and maximum process temperature. See “Switch mechanism specifications” on page 8 for information about all switch mechanisms. Not available for stainless steel enclosure and wetside models S163 and S181. See Table 10 on page 9 for a detailed comparison of the float types listed here. Refer to pages 11, 12, 13 and 14 for technical float details and length...

TDS-MHLSM-C: MAY 2023 Table 8. Float Switch Specifications - Marine Applications Aluminium bronze wetside models Enclosure and wetside Aluminium bronze to BS1400 – AB1 maximum iron content 2.5%. Enclosure is nickel-plated May be submerged to 100 ft. (30 m) head of water (IP68) Brass BS1400 DCB3 (non-hazardous area float switches) Aluminium Bronze BS400 AB, maximum 2.5% iron (hazardous area float switches) Maximum process temperature See Table 7 Gasket material Non-asbestos sheet material gaskets to BS 7531 Grade X, which has upper temperature limits of 482 ° F (250 °C) for gas, vapor, and...

TDS-MHLSM-C: MAY 2023 Table 9. Electrical switch mechanism specification Electrical type D and P Electrical switch mechanism Type D For alternative make and break circuits Function: 2 independent Single Pole Single Throw contacts sets and “snap-action” May be wired S.P.C.O. on site For switching two independent circuits Function Double Pole change over (2 independent circuits) and “snap-action” As type D and D6 but with Gold Plated Contacts for switching low power (e.g. Intrinsically Safe) electrical circuits Electrical switch specifications Contact material Fine silver Process temperature...

Mobrey ‘A’ flange Mobrey ‘A’ flange: 4 off Ø0.55 (Ø14) holes equi-spaced on 3.62 (92) PCD Note: Dimensions are in inches (mm). Marine float switches Float Type Float Material 1. Refer to pages 11, 12, 13 and 14 for technical float details and length options. See “Nozzle and stud lengths” on page 11 for stud lengths. Model: Marine Table 10. Float dimensions X, Y and Z - hazardous and marine float switches Magnetic Horizontal Level Switches

Pressure/Temperature Relationships The graphs below show the maximum allowable working pressure of our float assemblies and process connection flanges across their working temperature range. Stainless Steel Wetside Switches 200 150 F107 MOBREY "A" (GENERAL PURPOSE) F264 (MONEL) F68, F84, F98, F104 MOBREY "A" (HOSEPROOF/SUBMERSIBLE) TEMPERATURE (°C) F93 WORKING PRESSURE: LIMITED TO ATMOSPHERIC UP TO 180°C Non-Ferrous Wetside Switches Model: Marine Magnetic Horizontal Level Switches TEMPERATURE (°C) ALUMINIUM BRONZE WETSIDE SWITCHES GUNMETAL WETSIDE SWITCHES F93 WORKING PRESSURE: LIMITED TO...

TDS-MHLSM-C: MAY 2023 Nozzle and stud lengths L Table 11. Maximum Length in mm (Dimension L) F185 F88 F93 Minimum stud Table 12. Minimum stud projection (in mm) Rating Horizontal F68 pump control and alarm float Note: Dimensions are in inches (mm). Table 13. Dimensions and specifications for F68/* Maximum Intrusions (1) Minimum tank dimension above/ below centre line (mm) ‘Y’ Minimum Specific Gravity (S.G.) 1. These dimensions in inches (mm) are approximate for cold water and will vary for liquids with a different specific gravity (SG.) Model: Marine Switches fitted with the F68/+ type...