• Accuracy of 0.1% of reading
• Operating pressure of 15 psi to 10,000 psi (100kPa to 70,000 kPa)
• Operating media SAE 20 weight automotive or machine oil
• Certified traceable to the National Institute of Standards and Technology (N.I.S.T.).
• O-ring material Buna-N (D series)
• Stainless steel piston and cylinder material
• Non-magnetic die-cast zinc alloy weight material
• Reservoir volume approximately 1.5 pints (0.7 liter)
• Weight increments: 5, 10, 20, 25, 40, 50, 100, 200, 500 with optional 1 PSI incremental weight

The Ashcroft Type 1305D deadweight testers are the most economical, reliable, rugged and  Precision Deadweight testers on the market today. The 1305D series testers are great for the bench and portable for field work when you can't bring the gauge or instrument into the shop.

You can use the dead weights for calibrating or attach a Certified Test Gauge to the dead weight port for calibration purposes. Using the Test Gauges on the deadweight port can eliminate the need to carry the calibration weights into the field.

Ashcroft^® Type 1305D deadweight testers provide an easy means of precisely generating pressure to an accuracy of 0.1% of reading. Ashcroft 1305D units are available for operating ranges up to 10,000 psi. They are ideal for use in calibrating, setting, testing and repairing pressure measurement and control devices. Each 1305D unit is traceable to the National Institute of Standards and Technology, assuring instrument accuracy.

These pressure systems are designed to be field portable. A single carrying case holds the pressure generation pump as well as all the necessary tools and accessories. A second box contains the weights used for pressure generation (10,000 psi units require two boxes of weights). Ashcroft deadweight testers qualify as primary standards for pressure calibration.

The pump is a two-stage hydraulic pressure generator. A built-in shuttle valve allows for rapid pressure increase at low pressures. The rate of increase per pump cycle can be reduced at higher pressures to minimize resistance. This is accomplished by simply repositioning the two-position shuttle valve. With the shuttle valve in the high-pressure position, increasing pressure even when near the 10,000 psi upper limit can be accomplished quickly and easily. Final, precise adjustment is accomplished through the use of an integral vernier-adjustment knob.

The 1305D is provided with two-piston cylinder assemblies. A low-pressure piston for pressure ranges from 15 to 2000 psi and a high-pressure unit for pressures from 75 to 10,000 psi. The high-pressure piston has an area of 1Ú80th of a square inch while the low pressure piston has an area of 1/16th of a square inch. Weights are provided for pressure increments of 5, 10, 20, 25, 40, 50, 100, 200 and 500 psi (depending on piston in use). An optional 1 psi incremental weight is also available. Ashcroft 1305D testers can be used anywhere within their operational range without any change in accuracy. The same weights are used with both piston and cylinder assemblies.

Ashcroft 1305 units are available for psi, bar, kg/cm2 and kPa ranges. Each unit comes complete with a hand jack set (for removal of pointers on gauges being calibrated), spare O-rings and all tools, accessories and fittings required for normal use.

Please "click" on the "Product Specs" icon at the top of the page for complete information on the Ashcroft 1305D Series Deadweight Testers.