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8500 Series

Senior 4-Bolt Magnetic Liquid-Level Gauges

Application

The 8500 Series Senior gauges are specially designed for low-pressure, ambient temperature use in potable water tanks and holding tanks for gray or waste water on boats and recreational vehicles. Aircraft de-icing liquids and ethylene glycol/water mixtures in radiators have been successfully measured with these gauges.

General Information & Features

The 8500 Series gauges are available in gear-action models for top, centerline or angle mounting or in lever-action models for centerline mounting only.

The standard float is nitrile rubber. Polypropylene (FDA approved for potable water service) and stainless-steel floats are also available. Please specify your choice. The gauge is attached to a Senior flange with 2 1⁄2" bolt circle through use of four, 1⁄4" - 28 x 9⁄16" long bolts. The gasket is Buna-N.

Documents

Data Sheet

Installation Instructions — MS-530

Adapters 22 Series - Senior Stamped Brass

Model Number Action Mounting Dial, Sender or Switch Data
8540 Gear Top Senior TwinSite® Sender in choice of 0-30, 0-90, or 240-30 Ohm ranges. Direct-reading fractional dials may also be used.
8543 C/L or Angle
8550 Top Senior S.P.S.T. 1/2 Amp, standard. Many other switches available, see DS-364.
8553 C/L or Angle
8560 Top Senior side-reading fractional dial.
8580 #5002S00062 Senior direct-reading.
8583 C/L or Angle
L8543 Lever C/L #5141S00570 Senior direct-reading.
L8553 Senior S.P.S.T. 1/2 Amp, standard. Many other switches available, see DS-364.
L8583 #5002S00547 Senior direct-reading.

General Specifications*

Dial Data

Dials & senders are hermetically sealed & tested in 8" Hg vacuum.

Accuracy

Accuracy depends upon proper gauge sizing. Senior dials ±6%, TwinSite® dials ±10%. Accuracy may be less depending upon tank shape. Accuracy may be less near full and empty. Accuracy may be less if tank is not level. This gauge is not to be used for filling. All accuracy estimates are expressed as a percent of full scale.

Temperature Range

Standard is -40°F to 158°F, -40°C to 70°C.

Humidity

Exposed portion is suitable for high humidity and marine applications.

Shock

Suitable for mobile applications.

Vibration

Suitable for mobile applications.

Power

0.5 watts maximum for TwinSite® versions.

Tank Pressure

0 to 25 psig [0 to 1,7 Bar]

Approvals

Some models are UL recognized for marine water service.

 

Note: For installation instructions see MS-501/502 (mounting standards).

Materials of Construction*

Head

Injection-molded polyester plastic.

Gear Housing or Stop Adapter

Injection-molded acetal plastic.

Centershaft, Support Tube & Float Rod

Brass.

Gears, Cross Stud, & Bearings

Stainless steel.

Float

Nitrile Rubber.

Gasket

Buna-N, 0015-00004 or 0015-00079.

Drive Magnet

Plated Alnico.

Direct-Reading Dial

Aluminum with acrylic crystal.

Side-Reading Dial

Aluminum with Lexan crystal.

TwinSite® Sender

Polyamide.

Mounting Bolts

Zinc-plated steel, stainless steel optional.

 

When Ordering Specify:

1. Gauge model number.

2. Tank diameter and riser height.

3. Mounting location.

4. Any listed options.

 

 

*Materials and specifications are subject to change without notice. Pressure ratings subject to change due to temperature and other environmental considerations.

05/10/2016