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MADISON

MADISON is a manufacturer of liquid level sensors, flow switches, and ultrasonic transmitters, with a product line that includes float switches, piston-type flow switches, and non-contact level sensors. The company's catalog covers side-mounted and vertically mounted float switches in brass, stainless steel, and PBT constructions, as well as compact flow switches rated for high-pressure applications. MADISON products are used in industrial fluid handling, process control, and equipment protection applications where reliable level detection or flow verification is required. The float switch range includes mechanically alternating models with SPST contacts, available in close-on-rise or selectable configurations, with minimum media specific gravity ratings from 0.45 to 0.70. The FS8000 series flow switches feature 316 stainless steel piston construction, fixed set points, and normally open switch positions, with contact ratings of 0.07 A at 120V DC. The ultrasonic sensor line includes the U5098 series, which provides 4-20 mA output, ±0.2% accuracy, and ranges up to 19 feet, with 2-inch NPT connections. 3G Electric supplies over 126 SKUs of MADISON products, offering datasheets and logistics support for global procurement. The selection covers multiple mounting styles, wetted materials, and electrical terminations (lead wires), enabling engineers to match sensor specifications to media compatibility, pressure ratings, and installation constraints. MADISON products are typically applied in tank level monitoring, pump control, overflow prevention, and flow verification in industrial, commercial, and OEM systems.

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About MADISON

MADISON is a manufacturer of liquid level sensors, flow switches, and ultrasonic transmitters, with a product line that includes float switches, piston-type flow switches, and non-contact level sensors. The company's catalog covers side-mounted and vertically mounted float switches in brass, stainless steel, and PBT constructions, as well as compact flow switches rated for high-pressure applications. MADISON products are used in industrial fluid handling, process control, and equipment protection applications where reliable level detection or flow verification is required. The float switch range includes mechanically alternating models with SPST contacts, available in close-on-rise or selectable configurations, with minimum media specific gravity ratings from 0.45 to 0.70. The FS8000 series flow switches feature 316 stainless steel piston construction, fixed set points, and normally open switch positions, with contact ratings of 0.07 A at 120V DC. The ultrasonic sensor line includes the U5098 series, which provides 4-20 mA output, ±0.2% accuracy, and ranges up to 19 feet, with 2-inch NPT connections. 3G Electric supplies over 126 SKUs of MADISON products, offering datasheets and logistics support for global procurement. The selection covers multiple mounting styles, wetted materials, and electrical terminations (lead wires), enabling engineers to match sensor specifications to media compatibility, pressure ratings, and installation constraints. MADISON products are typically applied in tank level monitoring, pump control, overflow prevention, and flow verification in industrial, commercial, and OEM systems.

Common Applications

  • Industrial tank level monitoring — MADISON M4400-ULL-NO vertically mounted float switch for high-level alarm in water storage tanks
  • Pump control in wastewater systems — MADISON M4168-1 side-mounted float switch for automatic pump start/stop in sump pits
  • Hydraulic system flow verification — MADISON FS8000-20003 piston flow switch for detecting flow in lubrication lines
  • Chemical processing level sensing — MADISON M3827-3NO stainless steel float switch for corrosive liquid level detection
  • Non-contact level measurement in bulk storage — MADISON U5098-D024-019 ultrasonic sensor for tank level monitoring up to 19 ft
  • Cooling water flow monitoring — MADISON FS8000-10010 compact flow switch for verifying coolant flow in heat exchangers

Frequently asked questions

Common questions about MADISON from 3G Electric.

What materials are available for MADISON float switches?

MADISON float switches are offered in brass, 316 stainless steel, and PBT (polybutylene terephthalate) constructions. Brass models (e.g., M4168-1, M4400-ULL-NO, M4010) are suitable for non-corrosive fluids, while stainless steel versions (e.g., M3827-3NO) provide corrosion resistance for aggressive media. PBT models (e.g., M7740) offer chemical resistance and are lighter weight. The choice depends on the fluid type, temperature, and pressure requirements of the application.

What is the difference between side-mounted and vertically mounted MADISON float switches?

Side-mounted MADISON float switches, such as the M4168-1 and M3827-3NO, are designed for installation through the side wall of a tank, using a mechanically alternating mechanism to switch contacts. Vertically mounted switches, like the M4400-ULL-NO, are installed from the top of the tank and rely on a float that moves along a stem. Side-mounted switches are often used in limited headroom applications, while vertical mounts are common in deep tanks or where top access is preferred.

What is the operating principle of the MADISON FS8000 series flow switches?

The MADISON FS8000 series flow switches use a piston-type mechanism with a fixed set point. When flow reaches the preset rate, the piston moves to actuate a normally open switch contact. These switches are constructed from 316 stainless steel and are rated for high-pressure applications. They are designed for pipe sizes of 3/8 inch with NPT or tube connections, and have a contact rating of 0.07 A at 120V DC. They are suitable for verifying flow in hydraulic, lubrication, or cooling systems.

What output signal does the MADISON U5098 ultrasonic sensor provide?

The MADISON U5098 ultrasonic sensor provides a 4-20 mA analog output signal proportional to the measured level. It operates on 30V DC and has an accuracy of ±0.2% of full range. The sensor has a 2-inch NPT connection and a 2 1/8-inch antenna diameter, with a maximum range of 19 feet. It is designed for non-contact liquid level measurement in tanks or vessels where direct contact with the media is not desired.

What is the minimum media specific gravity required for MADISON float switches?

The minimum media specific gravity for MADISON float switches varies by model. For example, the M4400-ULL-NO requires a minimum specific gravity of 0.56, while the M3827-3NO requires 0.60, and the M4010 requires 0.45. The M7740 has a minimum of 0.70. This specification ensures the float has sufficient buoyancy to operate the switch mechanism. Engineers should verify the specific gravity of the process fluid against the model's rating to ensure reliable operation.

Does 3G Electric supply MADISON products?

Yes — 3G Electric (S) Pte. Ltd. supplies MADISON products. We stock the MADISON catalog and supply genuine factory-original products with full manufacturer warranty and technical support.