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Drum Level Indication Sensors
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RELATED PAGES: Floats | Relays & Controllers | Product Selection Guide | Temp. Sensors | Reference
Madison offers several standard and non-contact sensors for drum level indication
Madison offers several standard and non-contact sensors for drum level indication

M Series
Drum Level Indicators

Mini Ultrasonic Sensor mounted to drum head
Mini Ultrasonic Sensor mounted to drum head
Madison Company offers several level indication products designed specifically for standard 20-, 30- and 55-gallon drums. These level indicators will fit-up directly with standard 3/4” NPT bungs.

This family of standard level indicators comes in low-level, high-level and multi-level designs, for both low- and 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.

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 bung
Remote alarm and power abilities
Choice of contact or non-contact level indication
Choice of high and/or low level indication and alarm
Specifications:
M4168-X (4168-1 without alarm)
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”)
M4168 dimensions
M4169-X (4169-1 without alarm)
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 4 conductor, 22 AWG, Halar-jacketed; 72” length (±2”)
M4169 dimensions
U3M-X
Wetted Materials: PVC
Maximum Temperature: 60°C (140°F)
Maximum Pressure: 30 PSIG
Lead Wires: 6 conductor, 24 AWG, shielded, PVC-jacketed; 60" length (±2”)
Electrical: 12-30 VDC, 0.07 A max. @ 24 VDC
M4169 dimensions
Alarms
– Fixed mount to level switch 4168-X or 4169-X
– LED alarm standard
– Audible alarm option (to replace LED or in conjunction with an LED alarm)
Standard Models:
FIXED-MOUNT MODELS: Alarm Level Operation (Dry Conditions)
M4168-1-FM High NO
M4168-2-FM Low NC
M4168-3-FM
High & Low
NO/NC
M4169-1-FM High NO
M4169-2-FM Low NC
M4169-3-FM
High & Low
NO/NC
REMOTE-MOUNT MODELS: Alarm Level Operation (Dry Conditions)
M4168-1-RM High NO
M4168-2-RM Low NC
M4168-3-RM
High & Low
NO/NC
M4169-1-RM High NO
M4169-2-RM Low NC
M4169-3-RM
High & Low
NO/NC
NON-CONTACT MODELS: Electrical Connectors
or Lead Wires?
Relay? RS485
Communications?
U3M-148-3/4
No No No
U3M-148-3/4-18P154 Yes No No
U3M-148C485-3/4 No No Yes
U3M-148C485-3/4-18P154 Yes No Yes
U3M-148C485R-3/4 No Yes Yes
U3M-148C485R-3/4-18P154 Yes Yes Yes
U3M-148R-3/4 No Yes No
U3M-148R-3/4-18P154 Yes Yes No
 
All specifications are subject to change without notice.
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