M Series Interstitial Switch Madison Company’s Interstitial Switch is a thin profile device designed for double-wall tanks and pipes. The 3/8” high switch is ideal for underground tanks and piping where the doublewall construction needs to be monitored for product release from the inner tank. It can also be used to signal the presence of liquid leaks or overflows in any containment area by connecting to a suitable alarm indicator. The avoidance of potential cleanup costs through early detection of leaks is well worth the cost of this unit. The M3769 Interstitial Switch is constructed of a Valox 420 housing and foamed polypropylene float with a stainless steel pivot pin. The standard M3769 model comes with 10’ of Halar-jacketed cable. Typical Installation Cable to Customer Controller Shown in Open Position M3769 Double-Walled Pipe or Tank M3769 Features • • • • Thin profile Wide range of electrical voltages Full choice of alarms or control systems Easy installation Madison Company • (203) 488-4477 • (800) 466-5383 • Fax (203) 481-5036 • [email protected] • www.madisonco.com © Copyright Madison Company – 1/07 LL-31 LL

Specifications Materials – Current and Voltage Ratings – Body – Valox 420 Current Amps (Resistive) LL Voltage 0.14 0.28 0.07 0.28 Float – Foamed polypropylene 240 AC 120 AC 120 DC 24 DC Cable – 10’, two conductors Halar jacketed Temperature – 105˚C (221˚F), maximum Pressure – 50 PSIG, maximum Switch Rating – 30 Watt, SPST Operation – Normally Closed (NC), open on liquid rising Approvals – UL, CE .75" REF (19.1) 10' Cable Leads Switch Housing M3769 3.00" (76.2) Float Pivot Pin 1.50" (38.1) Attach String Here to Pull Through Tank 0.375" (9.53) All specifications are subject to change without notice....