M Series Drum Level Indication Madison Company offers several level indication products designed specifically for standard 20-, 30and 55-gallon drums. These level indicators will fit-up directly with standard 3/4” NPT bungs. This family of standard level indicators comes in lowlevel, high-level and multi-level designs, for both lowand high-level indication. The basic level switches require a power source. When configured with an alarm, battery power is on-board. Optional alarms are available in either a fixed-mount (to the level switch) or a remote-mount design. This option provides both the level switch and the alarm with battery power for ease of use in remote sites where a power source is not readily available. Above: Madison offers several standard and non-contact sensors for drum level indication Left: Mini Ultrasonic Sensor mounted to drum head For those drum applications requiring a non-contact level device, the Madison U3M Mini Ultrasonic Sensor is the way to go. This sensor also mounts directly into a 3/4” NPT bung and requires a power source. The sensor is calibrated by the user using an on-board push button. The U3M is available in two configurations: one that is designed for infrequent removal and the other with a connector lead-wire termination for quick disconnect and removal from the drum head. These sensors are configured with RS485 communications for PC networks. Features • Multiple drum level choices • Easy mating to standard drum bungs • Remote alarm and power abilities • Choice of contact or non-contact level indication • Choice of high and/or low level indication and alarm Madison Company • (203) 488-4477 • (800) 466-5383 • Fax (203) 481-5036 • [email protected] • www.madisonco.com © Copyright Madison Company – 10/07 LL-33 LL

Specifications M4168-X (4168-1 without alarm) LL M4169-X (M4169-1 without alarm) U3M-X Wetted Materials: Stem and Fittings – Brass Floats – Buna-N Grip Rings – Beryllium Copper Maximum Temperature: 105˚C (221˚F) Maximum Pressure: 150 PSIG Float Specific Gravity: ~ 0.5 Reed Switch Rating: 30-Watt SPST Lead Wires: 2 or 4 conductor, 22 AWG, Halar-jacketed; 72” length (±2”) Wetted Materials: Stem, Fittings and Floats — 316SS Grip Rings — PH-15-7 Mo SS Maximum Temperature: 150˚C (302˚F) Maximum Pressure: 250 PSIG Float Specific Gravity: 0.73 (±0.02) Reed Switch Rating: 30-Watt SPST Lead Wires: 2 or...