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8700 Series Gauge

Adjustable Magnetic Gauges

Application

The 8700 series gauges are used to measure water levels in all types of low-pressure, non-heated systems. Ideal for boats, recreational vehicles, campers, etc. NOTE: For hot or pressurized water service, see 8400 Series.

General Information & Features

The magnetic construction permits the complete sealing off of the inside liquid from the outside gauge head and dial allowing quick dial replacement without the loss of liquid or time.

The dial pointer is silicone-dampened. All dials, senders, and switches are instantly replaceable — there are just two screws to remove and replace.

The rugged gear drive is standard with shrouded, stainless steel, beveled gears designed to shed and work out any loose particles that might jam the gear action. All materials have been selected to provide outstanding durability in water-gauging applications.

These water gauges are designed for top mounting only. They are equipped with float arms which are to be cut off to the proper length for the tank into which they will be installed. Data sheet DS-337 furnishes the proper cut lengths and instructions on how to install the float and crimp it in place.

This gauge has a 5-bolt SAE pattern flange whichis attached to the tank with five #10 screws througha Buna-N gasket, #0015-00423.

Model Number Magnet Available Dials
8741 Large Alnico Direct-reading dial or TwinSite® sender.
Choice of 0-90, 240-30 Ohms
8781 Small Alnico Direct-reading dial only.

Model Selection Chart

Model Number Mounting Dial, Sender or Switch Data
8741-00008 20.5" [520] 5323S01834 direct-read P5744S02541
TwinSite® sender, 240-30 Ohms.
8741-00020 26" [660]

 

Documents

Data Sheet

MS-533 Installation Instructions

Tank Depth in Inches Distance from Float Bend to Float Rod Cut-off Point
6 3"
7 3-3/4"
8 4-5/8"
9 5-5/8"
10 6-5/8"
11 7-5/8"
12 8-5/8"
13 9-3/4"
Tank Depth in Inches Distance from Float Bend to Float Rod Cut-off Point
14 10-3/4"
15 11-3/4"
16 12-3/4"
17 13-3/4"
18 14-7/8"
19 15-7/8"
20 16-7/8"
21 17-7/8"
Tank Depth in Inches Distance from Float Bend to Float Rod Cut-off Point
22 18-7/8"
23 20"
24 21"
25 22"
26 23"
27 24"
28 25-1/8"
29 26-1/8"
Tank Depth in Inches Distance from Float Bend to Float Rod Cut-off Point
30 27-1/8"
31 28-1/8"
32 29-1/8"
33 30-1/4"
34 31-1/4"
35 32-1/4"
36 33-1/4"

General Specifications*

Mounting

Recommended for top-mounting only.

Accuracy

Accuracy depends upon proper gauge sizing. Junior dials ±7%, TwinSite® dials ±12%. 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

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

Shock & Vibration

Suitable to mobile applications.

Power

0.5 watts maximum for TwinSite® versions.

Tank Pressure

0 to 10 PSIG [0 to 0,68 Bar].

Approvals

UL recognized for marine water service.

 

Note: Installation Instructions MS-533.

 

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

Materials of Construction*

Head

Lightweight injection molded polyester SAE gasoline gauge flange (2-1/8" [54] bolt circle for five #10 screws not furnished).

Centershaft, Support Tube & Float Rod

Brass.

Gears, Cross Stud & Bearing

Stainless steel.

Drive Magnet

Plated Alnico.

Gear Housing

Acetal.

Float

Nitrile rubber.

Gasket

Buna-N, 0015-00423.

Direct Reading Dial

Hermetically sealed polycarbonate.

TwinSite® Sender

Polyamide.

Dial Screws

Plastite 0040-00479.

 

When Ordering Specify:

1. Gauge model number.

2. Choice of dials.

05-12-2016