We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brass vertical liquid level switch 32.94 inches long with Buna-N float and 3/4 NPT connection

Madison

Madison Liquid Level Switch 3/4 NPT Buna-N 32.94 in

SKU CH-SXCR-370JA

A vertical-mount liquid-level switch with a 32.94 in brass stem and Buna-N float, selectable SPST contacts rated 0.28 A at 240 V, 150 psi maximum pressure and 221 °F operating temperature

  • TypeLight Switch
  • Selectable switch function suits varied control needs
  • 94 in overall length fits deep tank installations
  • Buna-N float resists oil and chemical exposure
  • Brass stem and body withstand 150 psi pressure
  • SPST contact rated 0.28 A at 240 V

Industrial Liquid Level Switch

The Madison liquid level switch monitors fluid height in closed tanks and alternators. A brass stem measuring 32.94 inches positions a Buna-N float vertically for reliable actuation. The SPST contact form supports selectable switch function so the same unit can serve as a high-level or low-level alarm. It is built for maintenance crews and original-equipment installers who need a compact, vertically mounted sensor with a 3/4 inch NPT process connection.

Thermal and Electrical Limits

The switch operates up to 221 degrees Fahrenheit and withstands 150 psi maximum pressure. Electrical rating is 30 VA with a peak current of 0.28 amperes at 240 volts AC. Brass body and stem construction dissipates heat without active cooling so the device runs silently and draws no auxiliary power. These limits suit typical hydraulic reservoirs, lubrication circuits and alternator cooling loops.

Installation and Integration

A 3/4 inch NPT tank fitting and matching 3/4 inch conduit entry let the switch thread directly into existing ports. The 32 inch stem length reaches deep tanks while the 0.9 inch float diameter clears narrow openings. No external controller or separate power supply is required; the dry contact closes the monitoring circuit directly. Builders needing multiple actuation points or horizontal mounting must choose a different device.

Highlights

  • Selectable switch function suits varied control needs
  • 94 in overall length fits deep tank installations
  • Buna-N float resists oil and chemical exposure
  • Brass stem and body withstand 150 psi pressure
  • SPST contact rated 0.28 A at 240 V

Specifications

BrandMadison
TypeLight Switch

Questions about this item

How do I install the 3/4 in NPT liquid level switch vertically in an open tank, and what step is often missed?

Thread the 3/4 in NPT brass stem into the tank opening, secure the 3/4 in conduit connection, then set the selectable switch function before powering the 30 VA, 240 V max circuit.

What maintenance will the Buna-N float and brass stem need over time?

Inspect the 1.25 in long, 0.9 in diameter Buna-N float and 32 in brass stem periodically for debris or corrosion that could restrict movement at the 150 psi pressure limit.

At what temperature does the switch reach its operating limit during sustained use?

The maximum operating temperature is 221 degrees F, which is the first limit reached under continuous high-temperature liquid exposure.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.