产品展示
	Standard piston gauge for wide range (Grad Ⅰ)

● Basic error
In full scale, the basic error is ±0.02 %percent measuring pressure.
● Purpose
Be used for calibrating piston gauge, ball pneumatic deadweight tester, pressure sensor, pressure transmitter, digital pressure gauge and other precision pressure gauge.
● Characteristic
★ Wide range. When the lower pressure is 1MPa, the basic errors of KY6, KY60 and KY100 type piston gauges are 0.02%. Therefore a KY100 type piston gauge can substitute for three domestic piston gauges with respective upper pressure 6MPa, 60MPa and 100MPa.
★ Piston and piston cylinder are made from WC hard metal alloy with high strength, high hardness and low linear expansion coefficient of temperature. Hence through calculating, the distortion error of piston system under pressing can be ignored. Even though the ambient temperature is widen to 20±5℃, the properties of piston gauge is still stabile.
★ Because a precision furbishing process is used for the working piston and piston cylinder, the cylindricity and the gap between piston and piston cylinder are very small. Therefore giving up using castor oil with viscosity 900~1100mm2/S as pressure medium, instead using癸二酸二酯,which has excessively low viscosity 20~25 mm2/S and is appointed as the medium in the international pressure comparison，ensure that piston gauge have the most sensitivity.
★ The working position of piston is monitored by displacement sensor, which makes piston gauge more sensitive and accurate.
★ Low gravity center of loads, piston rotating steadily and pressure fluctuating obscurely too much.
★ Novel seal structure and excellent properties.
★ Pump，pressure regulator, valve and pipe can be used conveniently because of reliability，portability and perfection.
★ Three 100MPa sample machines were tested by Shanghai Institute of measurement and test, and the results are as follows:
At the low limit pressure 1MPa, the sensitivity of piston gauge is 20mg, which is relatively 2×10-5;
In the middle of scale, the duration of free rotation of piston is beyond 2h;
At the upper pressure, the decline speeds of piston are respectively 0.08mm/min, 0.18mm/min and 0.14mm/min. The experimental results are excessively ideal, and won well from the institute.
A traceable calibration is included in the price of the above pressure gauges and a calibration certificate is provided by National Institute of Metrology P.R.China or Shanghai Institute of measurement and testing technology when sent out from our corporation.