Consent Preferences

8600 Series

1-1/2” MNPT Top Mount Spiral Gauge for Hydraulic, Lubricating, Fuel-Oil, Gasoline and Diesel Tanks

Models 8660 and 8680 are intended for stationary or mobile fuel tank applications containing middle distillates such as diesel and unless equipped with optional stainless steel support rods are not intended for use in fuels containing more than 10% ethanol or more than 30% bio-diesel. These gauges are not intended for use in pressure vessels. Models with optional stainless steel supports may also be used for fuels containing ethanol, bio-diesel and interstitial applications. The 8600 Series is not recommended for off-road equipment.

General Information
The 8660 spiral gauge is supplied with an easy to read, side-view fractional dial. The model 8680 spiral gauge is equipped with a standard top reading fractional dial.

All 8600 Series spiral gauges have a 1 1⁄2″ MNPT tank connection and are suitable for tank pressures up to 25 psig maximum. They are designed for top mounting in tanks up to 30″ deep are UL listed for flammable liquids.

Rochester gauge dials are magnetically driven. Fuel vapor cannot reach inside of the gauge lens and attack the UV rated lens material. Rochester Sensors may be easily converted for remote output by simply installing the R3D Remote Ready dial and plugin Hall Effect sender module.

Data Sheet
Florida DEP Registered Equipment List EQ-901

General Specifications*

Designed for top-mounting only.

Accuracy depends upon proper gauge sizing. Direct read dials +/-8%, 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. Device does not prevent overfill. All accuracy estimates are expressed as a percent of full scale.

Standard operating range is -40°F to 158°F, -40°C to 70°C.
Exposed portions should be painted for marine applications, less dial.

Shorter styles are suitable for some mobile, off-road applications.

Shorter styles are suitable for some mobile, off-road applications.
0.5 watts maximum for TwinSite® versions.

Tank Pressure
0 to 25 PSIG [0 – 1,7 Bar] maximum.
Direct indicating gauge. Available UL listed for flammable liquids. Some models UL recognized for marine service.

When Ordering Specify:

1. Gauge model number.
2. Tank height.
3. Ohm range on TwinSite® version.
4. Riser height, if any.
5. Any special requirements.

Materials of Construction*

Die-cast zinc.

Guide Rod
Zinc-plated steel.


Tie Plate, Guide, & Bearing Pin
Stainless steel.

Center Shaft Holder & Magnet Bushing

Nitrile rubber.

Drive Magnet
Neo, nickel-plated.

Standard Dial
Polycarbonate, hermetically sealed.

Side-View Dial
Aluminum with polycarbonate crystal, hermetically sealed.

TwinSite® Sender

Model Number Sender or Dial Type
8640 Senior TwinSite® Sender in choice of
0-30, 0-90, or 240-30 Ohm ranges. Specify your preference when ordering.
8660 #5025S00570
Senior side-reading fractional dial.
8680 #5844S01793
Senior direct-reading
fractional dial.

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

Product Inquiry - 8600

    Related Products

    Revised 06-29-2018