For low and negative pressure measurements on clean and non corrosive gases. Convenient for measuring gas circuits or pharmaceutical equipments
Specification: 
1. Dimension: 63mm, 75mm, 100mm. 
2. Accuracy: 63mm class ±2%, 75mm class ±1.5%, 100mm class ±1.5%. 
3. Pressure range: -200 mm aq vac to 5000 mm aq. 
4. Operating temperature: working temperature 60℃ max., ambient: -20℃ ~60℃. 
5. Connection: brass alloy. 
6. Mounting: lbm/cbm 63mm thread: 13mm 75, 100mm thread: 17mm 1/4’’, 3/8’’, 1/2’’, npt, bspt, bsp. 
7. Sensing element: brass alloy diaphragms, when pressure is supplied to one side of the diaphragm, the degree of flexing. 
8. Movement: brass alloy. 
9. Dial: aluminium in white & lettering in black. 
10. Pointer: aluminium in black. 
11. Case: stamped sheet steel: black phosphated and painted or anodized by customise finish. 
12. Upper ring steel: black phosphated and painted or anodized by customise finish. 
13. Window: glass or acrylic. 
14. Order options (1) Front or rear flange. (2) Adjustable red mark pointer.