Rochester Gauges 8640 Series 1 1/2 in. Top Mounting Magnetic Liquid Level Tank Gauge w/ Senior TwinSite Dial – Range: 240-30 Ohm – Fits 48 3/4 in. Tank Depth

Description

The 8600 Series Senior spiral gauges are designed for use in measuring liquid levels in hydraulic, lubricating or fuel-oil storage tanks, and gasoline and diesel fuel levels in stationary, standby and mobile generators. The 8600 Series is not recommended for off-road equipment.
The 8640 spiral gauge incorporates a strong nickel-plated Neo magnet capable of driving a TwinSite® sender which provides a direct, fractional reading and also sends an electrical signal to a remote receiver.
All 8600 Series spiral gauges have a 1 1/2 in. MNPT tank connection and are suitable for tank pressures up to 25 psig maximum. They are designed for top mounting in tanks.

Specifications

Range: 240-30 Ohm
Mounting: Designed for top-mounting only
Temperature: Standard operating range is -40°F to 158°F, -40°C to 70°C
Humidity: Exposed portions should be painted for marine applications, less dial
Shock: Shorter styles are suitable for some mobile, off-road applications
Vibration: Shorter styles are suitable for some mobile, off-road applications
Power: 0.5 watts maximum for TwinSite® versions
Tank Pressure: 0 to 25 PSIG [0 – 1,7 Bar] maximum
Approval: Direct indicating gauge. Available UL listed for flammable liquids. Some models UL recognized for marine service
Accuracy: Accuracy depends upon proper gauge sizing and tank set up – TwinSite dials +/-12%

Construction

Head: Die-cast zinc
Guide Rod: Zinc-plated steel
Centershaft: Brass
Tie Plate, Guide, & Bearing Pin: Stainless steel
Center Shaft Holder & Magnet Bushing: Acetal
Float: Nitrile rubber
Drive Magnet: Neo, nickel-plated
TwinSite® Sender: Polyamide

Downloads
MS-516 Spiral – Installation Guide (PDF Download)