1 ” N P S M T h re a d e d H e a d S p ira l G a u g e s

ISO 9001:2008 CERTIFIED
AN-16 Threaded Head
Spiral Gauges
The 8683 Junior Top Mount Model
Threaded Head Medium Duty
Spiral Gauge is designed for use
in measuring liquid levels in gasoline, diesel fuel, bio-diesel, hydraulic and lubricating oils where
space restrictions prevent the use
of a swing-arm style mechanical
gauge. It is ideal for medium duty
construction & agriculture, lawn &
garden and recreational vehicle
applications.
General Information & Features
• Field Replaceable Snap-On Fractional Dial
• Solid One-Piece Head Construction, No-Leakage Path to Dial
The Threaded Head mounting of the 8683 Spiral Gauge allows a tight seal that restricts vapor loss.
The “Screw In” mounting contributes to the gauges adaptability for use in restricted areas.
The 8683 Threaded Head Spiral Gauge is designed for top mounting utilizing a Viton rubber O-ring, an
easy to read fractional dial, and is available in lengths from 6 to 20 inches.
Nitrile
Rubber Float
Acetal Head
Acetal
Centershaft
Holder
AN-16 Threaded Head
Spiral Gauges
Application
8683
Viton O-Ring
Nylon Composite Drive
Magnet with Acetal Holder
S/S Centershaft
and Tie Plate
Copolymer
Hermetically
Sealed Dial
Stainless Steel
Bearing Guide,
Guide Rod and
Bearing Pin
See reverse side for dimensional data, materials of construction, performance, and advice on how to order.
The Measure of Excellence
01/09/2015
AN-16 Threaded Head Spiral Gauges
8683
View of Magnetic Coupling
1/ 2
FIELD REPLACEABLE
SNAP-ON FRACTIONAL DIAL
1/ 4
MAGNET
ES
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RO
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F
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.
3/4
GA
AS
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ES
DA
I NC . OF TEXAS ,
,
Ø48.26 [1.90]
1" NPSM
THREADED HEAD
16.73 [.66]
SOLID CONSTRUCTION
HEAD. NO-LEAKAGE
PATH TO DIAL
19.05 [.75]
AS REQ'D FROM 6" UP TO 20"
1/ 2
3/
4
ES
CH
RO
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E
F
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S.
A.
1/4
GA
AS
DIA L
1
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N O . 5 - 294
ES
DA
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I NC .
OF TEXA
,
32.00 [1.26]
General Specifications*
Ø31.12 [1.225]
Mounting
Designed for top-mounting only. Gauge uses threaded
head.
Accuracy
Accuracy depends upon proper gauge sizing. Direct read
dials +/-7%. 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 operating range is -40°F to 158°F, -40°C to 70°C.
Shock & Vibration
Suitable for mobile, off-road medium duty, and marine applications.
Tank Pressure
0 to 14.5 psig [0 - 1.0 Bar] maximum.
Tank Opening Details
Fits AN-16 port or 1” NPSL fitting. See MS-525.
When ordering, specify:
O-RING
The Rochester magnetic liquid level gauge operates simply
by means of a float actuating a powerful magnet inside the
container which in turn provides an invisible “magnetic coupling”, through a solid head, with the magnet on the pointer in
the dial chamber. Thus the gauge head completely seals off
the liquid in the container so the dial may be removed and
replaced quickly anytime without loss of liquid.
Materials of Construction*
Head
Acetal.
Seal
Viton O-Ring. (See MS-525 for O-ring sizes.)
Guide Rod
Stainless steel.
Centershaft
Stainless steel.
Tie Plate
Stainless steel.
Guide & Bearing Pin
Stainless steel.
Float
Nitrile Ebonite.
Drive Magnet
Nylon 12 composite.
Standard Dial
Copolymer, hermetically sealed, gasoline resistant.
Magnet Holder & Centershaft Holder
Acetal.
1. Gauge model number.
2. Tank depth.
3. Riser height, if any.
* Materials and specifications are subject to change without notice.
Pressure ratings subject to change due to temperature and other environmental considerations.
The Measure of Excellence
01/09/2015
11616 Harry Hines Blvd. • P.O. Box 29242 • Dallas, TX 75229 • (972) 241-2161 • FAX (972) 620-3374
Website http://www.rochestergauges.com • E-mail [email protected]

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