The 6540-00252 Adjustable 240-30 Ohms TwinSite® gauge is manufactured by Rochester Gauges in Dallas, TX, USA. The 6500 Series Senior gauges mount to a flange with a 2-1/2" 4-bolt circle [63.5mm] and are designed too mounted for use in low-pressure tanks 0-25 psig [0-1.7Bar] containing diesel fuel, gasoline, fuel oil and lubricating oils. Some common applications include construction equipment, stationary generators, boats, farm equipment and home heating.
The TwinSite® dials allow for direct reading at the installation location as well as the ability to transmit the liquid level readings to a remote receiver or control box. The 6540-00252 model features a 3-5/8” fixed support and a 30” adjustable length float arm.
For consistency with all other 6500 series adjustable gauges (and for compatibility with the manufacturer’s cutting instructions) we stock and sell a 240-30 Ohms TwinSite gauge with a 3” fixed support and 30” adjustable length float arm, rather than the 6540-00252. This item is NOT the 6540-00252, it is a 6500 series adjustable gauge with 240-30 Ohms TwinSite Dial. Each 6500 series adjustable gauge ships with a Buna-N gasket and (4)1⁄4"-28 x 9⁄16" long bolts.
6500 Series TwinSite® Adjustable Gauge General Specifications:
Temperature Range: -40°F to +158°F, -40°C to 70°C.
Humidity: Paint exposed portions of gauge, less dial, for marine applications.
Shock & Vibration: Suitable for mobile applications.
Power: 0.5 watts maximum for TwinSite® versions.
Tank Pressure: Up to 25 psig [1,7Bar]
Accuracy: Accuracy depends upon proper gauge sizing. Senior 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.
Materials of Construction*
Head: Die cast aluminum
Center shaft, Support Tube & Float Rod: Tempered aluminum
Gears, Cross Stud & Bearings: Stainless steel
Drive Magnet: Alnico
Gear Housing: Acetal plastic or Aluminum
Float: Nitrile rubber
Gasket: Buna–N, 0015-00004 or 0015-00079
Direct Reading Dial: Aluminum with acrylic crystal, hermetically sealed.
Side Reading Dial: Aluminum with polycarbonate crystal, hermetically sealed.
TwinSite® Sender: Polyamide.
Mounting Bolts: Zinc-plated steel 1/4”-28 x 9/16” long.
*Materials and specifications are subject to change without notice. Pressure ratings subject to change due to temperature and other environmental considerations.
Note: For installation instructions see MS-501/502 (mounting standard).