Rochester Gauges 8640 Series 1 1/2 in. Top Mounting Magnetic Liquid Level Tank Gauge w/ Senior TwinSite Dial - Range: 240-30 Ohm - Fits 19 1/2 in. Tank Depth

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 up to 36 in. deep and some models are UL listed for flammable liquids.

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)