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MADISON

Madison Company is a manufacturer of liquid level and flow sensing devices, with a history dating back to 1948. The brand is known for float switches, flow switches, and level sensors used across industrial, commercial, and municipal applications. Madison products are commonly specified for their straightforward mechanical and electronic designs, material options that accommodate a range of media, and compatibility with standard process connections. 3G Electric supplies the Madison line globally, offering technical buyers access to float switches, ultrasonic level transmitters, and related accessories. The product families include mechanically alternating side-mounted float switches, non-contact ultrasonic level sensor transmitters, and other level and flow sensing instruments. These devices are used in tanks, vessels, sumps, and process lines where reliable point-level or continuous-level measurement is required. Madison float switches are available in materials such as polypropylene and Kynar, with specific gravity ratings that suit different liquids. For example, the M8700-C and MSB8800 models feature polypropylene construction and selectable SPST outputs, while the M9705 uses a Kynar body for compatibility with more aggressive fluids. The mechanically alternating design allows the switch to be used in applications where pump alternation or multiple setpoints are needed. Ultrasonic level transmitters from Madison provide non-contact measurement with ranges up to 19 feet and accuracy of ±0.2% to ±0.25% of full scale. Models like the U3M-148 series offer 1-inch NPT connections and PVC construction, while the U5098-D024-019 has a 2-inch NPT connection and a 2-1/8 inch antenna. These transmitters operate on 30V DC and provide 4-20mA output, making them suitable for integration with PLCs, SCADA systems, and other control equipment. The devices are designed for continuous level monitoring in tanks and vessels, with no moving parts to wear out. 3G Electric supports the Madison line by maintaining inventory of popular models and providing application assistance to help select the appropriate switch or sensor for a given fluid, tank geometry, and control scheme. Technical documentation, including wiring diagrams and specification sheets, is available to aid in installation and commissioning. For procurement specialists, 3G Electric offers global shipping and handles logistics for both standard and hard-to-find Madison part numbers. The focus is on supplying the correct component with the required materials, ratings, and output types, rather than promoting a one-size-fits-all solution. Whether the requirement is a simple float switch for high-level alarm or a non-contact ultrasonic transmitter for continuous inventory monitoring, the Madison product range covers a broad spectrum of industrial level sensing needs.

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About MADISON

Madison Company is a manufacturer of liquid level and flow sensing devices, with a history dating back to 1948. The brand is known for float switches, flow switches, and level sensors used across industrial, commercial, and municipal applications. Madison products are commonly specified for their straightforward mechanical and electronic designs, material options that accommodate a range of media, and compatibility with standard process connections. 3G Electric supplies the Madison line globally, offering technical buyers access to float switches, ultrasonic level transmitters, and related accessories. The product families include mechanically alternating side-mounted float switches, non-contact ultrasonic level sensor transmitters, and other level and flow sensing instruments. These devices are used in tanks, vessels, sumps, and process lines where reliable point-level or continuous-level measurement is required. Madison float switches are available in materials such as polypropylene and Kynar, with specific gravity ratings that suit different liquids. For example, the M8700-C and MSB8800 models feature polypropylene construction and selectable SPST outputs, while the M9705 uses a Kynar body for compatibility with more aggressive fluids. The mechanically alternating design allows the switch to be used in applications where pump alternation or multiple setpoints are needed. Ultrasonic level transmitters from Madison provide non-contact measurement with ranges up to 19 feet and accuracy of ±0.2% to ±0.25% of full scale. Models like the U3M-148 series offer 1-inch NPT connections and PVC construction, while the U5098-D024-019 has a 2-inch NPT connection and a 2-1/8 inch antenna. These transmitters operate on 30V DC and provide 4-20mA output, making them suitable for integration with PLCs, SCADA systems, and other control equipment. The devices are designed for continuous level monitoring in tanks and vessels, with no moving parts to wear out. 3G Electric supports the Madison line by maintaining inventory of popular models and providing application assistance to help select the appropriate switch or sensor for a given fluid, tank geometry, and control scheme. Technical documentation, including wiring diagrams and specification sheets, is available to aid in installation and commissioning. For procurement specialists, 3G Electric offers global shipping and handles logistics for both standard and hard-to-find Madison part numbers. The focus is on supplying the correct component with the required materials, ratings, and output types, rather than promoting a one-size-fits-all solution. Whether the requirement is a simple float switch for high-level alarm or a non-contact ultrasonic transmitter for continuous inventory monitoring, the Madison product range covers a broad spectrum of industrial level sensing needs.

Common Applications

  • Water and wastewater treatment — Madison mechanically alternating float switches (M8700-C, MSB8800) for pump alternation and high-level alarm in wet wells and lift stations.
  • Chemical processing — Madison Kynar-bodied float switch (M9705) for level detection in tanks containing aggressive acids or solvents.
  • Oil and gas — Madison ultrasonic level transmitter (U5098-D024-019) for non-contact continuous level measurement in storage tanks up to 19 feet.
  • Food and beverage — Madison ultrasonic level sensor (U3M-148) with PVC housing for hygienic, non-contact level monitoring in mixing and holding tanks.
  • Power generation — Madison side-mounted float switches (M8790-14/4184) for sump and condensate tank level control in boiler rooms and turbine halls.
  • Municipal water supply — Madison ultrasonic transmitters (U3M-148C485) with 4-20mA output for remote monitoring of reservoir and clearwell levels.

Frequently asked questions

Common questions about MADISON from 3G Electric.

What materials are available for Madison mechanically alternating side-mounted float switches?

Madison mechanically alternating side-mounted float switches are offered in polypropylene and Kynar (PVDF) body materials. Polypropylene models, such as the M8700-C and MSB8800, are suitable for water and many chemical solutions. Kynar models, like the M9705, provide enhanced chemical resistance for more aggressive fluids. Specific gravity ratings vary by model, ranging from 0.63 to 1.13, which determines the minimum liquid density required for proper float operation. Selection depends on the compatibility of the wetted materials with the process fluid and the specific gravity of the liquid at operating temperature.

What is the range and accuracy of Madison ultrasonic level transmitters?

Madison ultrasonic level transmitters are available with measurement ranges up to 19 feet (5.8 meters). Accuracy is typically specified as ±0.25% of full scale for the U3M-148 series and ±0.2% of full range for the U5098-D024-019 model. These non-contact devices operate on 30V DC and provide a 4-20mA output signal. The U3M-148 series features a 1-inch NPT connection and PVC construction, while the U5098-D024-019 has a 2-inch NPT connection and a 2-1/8 inch antenna. Range and accuracy depend on the specific model and application conditions, such as temperature and vapor space.

How does a mechanically alternating float switch work in a pump control application?

A mechanically alternating side-mounted float switch uses a float that moves with liquid level to actuate a switch mechanism. In pump control, the alternating feature allows two pumps to share duty by toggling the lead pump on each cycle. The switch provides a selectable SPST output, which can be wired to a control panel to start and stop pumps at predetermined levels. The specific gravity rating of the float must be lower than the liquid's specific gravity to ensure proper buoyancy. Installation is typically through the side of a tank or vessel, with the float positioned at the desired switching point.

What are the electrical specifications for Madison ultrasonic level sensor transmitters?

Madison ultrasonic level sensor transmitters, such as the U3M-148 and U5098-D024-019 models, operate on 30V DC. They provide a 4-20mA analog output proportional to the liquid level. The transmitters are non-contact, meaning no part of the sensor touches the liquid, which reduces maintenance and contamination risks. The U3M-148 series has a 1-inch NPT process connection and PVC housing, while the U5098-D024-019 uses a 2-inch NPT connection. Wiring is typically two-wire loop-powered for the 4-20mA signal, but always refer to the specific product datasheet for wiring details and load limitations.

Can Madison float switches be used in outdoor or washdown environments?

Madison float switches are available with different enclosure ratings depending on the model. Many side-mounted float switches have lead wire terminations and are designed for installation inside tanks or vessels, where they are not directly exposed to weather. For outdoor or washdown applications, the switch would typically be installed within a protective enclosure or junction box. The wetted materials, such as polypropylene and Kynar, are resistant to many chemicals and UV exposure, but the switch mechanism itself should be protected from direct water spray. Consult the specific model's specifications for environmental ratings.

What is the difference between the Madison U3M-148 and U5098-D024-019 ultrasonic transmitters?

The Madison U3M-148 and U5098-D024-019 are both non-contact ultrasonic level transmitters, but they differ in range, connection size, and accuracy. The U3M-148 series has a 6-foot range, 1-inch NPT connection, and ±0.25% accuracy. The U5098-D024-019 has a longer 19-foot range, a larger 2-inch NPT connection, and ±0.2% accuracy. Both operate on 30V DC with 4-20mA output. The U3M-148 is suited for smaller tanks and short-range measurements, while the U5098-D024-019 is better for larger vessels or sumps where a longer range is needed. Selection depends on tank dimensions and required accuracy.