Ultra high purity pressure switch

Type: P840 series (316L type)

 

Service intended

 

P840 series are specially designed for the ultra-high purity gas distribution system used in a semiconductor, electronic, medical, biotechnology and pharmaceutical industry.

 

Nominal diameter

 

50 mm (2")

 

Switch point accuracy

 

±2.0 % of full scale

 

Scale range

 

0 ~ 28 MPa

 

Working pressure

 

Steady pressure : 75 % of full scale value
Fluctuating pressure : 67 % of full scale value

 

Working temperature

 

Ambient : -20 ~ 65 °C
Fluid : Max. 100 °C

 

Temperature effect

 

Accuracy at temperature above and below the reference temperature (20 ℃) will be effected by approximately
±0.4 % per 10 ℃ of full scale

 

 

Standard features

Mechanical

 

Pressure connection

 

Type 316L SS electropolished low mount or center back mount
surface finish Ra≤0.25 ㎛
■ ¼" NPT male thread
■ VCR® male or female face seal fitting

 

Element

 

Type 316L SS
<6 MPa : C-type bourdon tube
≥6 MPa : Helical type bourdon tube

 

Case

 

Type 304SS, Electropolished with pressure relief

 

Cover and window

 

Twist-lock polycarbonate

 

Movement

 

Stainless steel

 

Pointer

 

Black painted aluminium alloy

 

Dial

 

White PVC, with pointer stop pin
With black/red lettering, dual pressure scale (bar)

 

Helium leak rate

 

Tested to confirm leakage rates of less than
10 -9 mbar • ℓ/sec

 

 

Standard features

Electrical

 

Connection

 

26 AWG, PVC
6 feet (2 m)

 

Maximum switching current

 

0.5 amps AC/DC noninductive load

 

Maximum power

 

10 W/DC, 12 VA/AC

 

Maximum switching voltage

 

28 V AC/DC

 

 

Download:  CATALOG 

Đồng hồ áp suất công tắc áp suất siêu sạch P841 P842 P843