由Doug Ralston于1969年创立，如今Ralston Instruments仍然是一家拥有创新历史的家族企业。为满足对全球各行业中压力仪表校准方便，准确的需求，Ralston于1969年发明了di一台手持式气动泵，随后于1970年开发出di一台液压手动泵。
对推进压力校准组件的热情仍然没有减弱。1993年，RI推出了第一个完全集成的Quick-test™软管和适配器系统。这种独特的设计专为任何被测设备的低容量，高压连接而设计，无需使用扳手或螺纹密封剂即可提供安全，省时的连接。Ralston的集成校准压力源是使用氮气或压缩气体进行差压或静压校准的最终解决方案。
所有Ralston产品均采用zhuoyue的设计和制造技术在美国制造。这些产品包括手动泵，压缩气体控制装置，软管，适配器和完整的校准套件。
当工作需要手动泵为压力，软管和适配器提供快速，故障安全连接或精密校准工具时，Ralston Instruments提供最完整的压力校准解决方案，无论是在实验室还是在远程位置。
主要产品：压力校准产品，微孔软管，数字压力表，压力校准器，压力和真空校准测试泵，压缩气体和台式校准，气体采样泵
部分型号：
ModelMax PressurePressure ReferenceProcess ConnectionReference Connection
DCAP-0000650 PSI / 45 bar / 4.50 MPaNone1/4" Male NPTNone
DCAP-1MSA650 PSI / 45 bar / 4.50 MPaNone1/4" Male NPT1/8" Male NPT
DCAP-2MSA650 PSI / 45 bar / 4.50 MPaNone1/4" Male NPT1/4" Male NPT
DCAP-2FSA650 PSI / 45 bar / 4.50 MPaNone1/4" Male NPT1/4" Female NPT
DCAP-300PSIG-D650 PSI / 45 bar / 4.50 MPaDigital pressure gauge, 500 PSIG Pressure1/4" Male NPT1/4" Female NPT
DCAP-500PSIG-D650 PSI / 45 bar / 4.50 MPaDigital pressure gauge, 500 PSIG Pressure1/4" Male NPT1/4" Female NPT
DCAP-1KPSIG-D650 PSI / 45 bar / 4.50 MPaDigital pressure gauge, 500 PSIG Pressure1/4" Male NPT1/4" Female NPT
DCAP-300PSIG-FL650 PSI / 45 bar / 4.50 MPaPressure FieldLab, 500 psi / 35 bar / 3.5 MPa1/4" Male NPT
DCAP-500PSIG-FL650 PSI / 45 bar / 4.50 MPaPressure FieldLab, 500 psi / 35 bar / 3.5 MPa1/4" Male NPT
DCAP-1KPSIG-FL650 PSI / 45 bar / 4.50 MPaPressure FieldLab, 500 psi / 35 bar / 3.5 MPa1/4" Male NPT
DPPV-0000125 PSI / 9 bar / 900 kPa23 In Hg / 59 cm HgNoneNone1/4" Male NPT
DPPV-1MBA125 PSI / 9 bar / 900 kPa23 In Hg / 59 cm Hg1/8" Male NPTNone1/4" Male NPT
DPPV-2MBA125 PSI / 9 bar / 900 kPa23 In Hg / 59 cm Hg1/4" Male NPTNone1/4" Male NPT
DPPV-2FBA125 PSI / 9 bar / 900 kPa23 In Hg / 59 cm Hg1/4" Female NPTNone1/4" Male NPT
DPPV-2FBA-RG125 PSI / 9 bar / 900 kPa23 In Hg / 59 cm Hg1/4" Female BSPP (G1/4)None1/4" Female BSPP (G1/4)
DPPV-3FBA-RG125 PSI / 9 bar / 900 kPa23 In Hg / 59 cm Hg3/8" Female BSPP (G3/8)None1/4" Female BSPP (G1/4)
DPPV-4FBA-RG125 PSI / 9 bar / 900 kPa23 In Hg / 59 cm Hg1/2" Female BSPP (G1/2)None1/4" Female BSPP (G1/4)
ModelMax PressureMeasurement TypeProcess Connection
LC10-GB2M5 PSI / 34 mbar / 34 kPaGauge Pressure1/4" Male NPT
LC10-GD2M15 PSI / 2 bar / 200 kPaGauge Pressure1/4" Male NPT
LC10-GF2M30 PSI / 3 bar / 300 kPaGauge Pressure1/4" Male NPT
LC10-GH2M50 PSI / 4 bar / 400 kPaGauge Pressure1/4" Male NPT
LC10-GJ2M100 PSI / 7 bar / 700 kPaGauge Pressure1/4" Male NPT
LC10-GL2M300 PSI / 21 bar / 2.10 MPaGauge Pressure1/4" Male NPT
LC10-GN2M500 PSI / 35 bar / 3.50 MPaGauge Pressure1/4" Male NPT
LC10-GP2M1000 PSI / 69 bar / 6.90 MPaGauge Pressure1/4" Male NPT
LC10-GR2M3000 PSI / 205 bar / 21 MPaGauge Pressure1/4" Male NPT
LC10-GT2M5000 PSI / 345 bar / 35 MPaGauge Pressure1/4" Male NPT
LC10-GV2M10000 PSI / 690 bar / 69 MPaGauge Pressure1/4" Male NPT
LC10-GA2M0 PSI / 0 mbar / 0.00 kPa30 In Hg / 77 cm HgVacuum1/4" Male NPT
LC10-GC2M15 PSI / 2 bar / 200 kPa30 In Hg / 77 cm HgGauge Pressure, Vacuum1/4" Male NPT
