P421 Series_Low pressure gauge
Service intended
P421 series are designed to measure low, vacuum or compound pressure. These models have a stainless steel measuring element which consists of two formed diaphragms and diaphragms are welded together.
| Nominal diameter | 100 and 150 mm |
| Accuracy | ±1.0 % of full scale ±1.5 % of full scale |
| Scale range (kPa, mbar) | -35 ~ 0 to -1 ~ 0 kPa -15 ~ 15 to -0.5 ~ 0.5 kPa 0 ~1 to 0 ~ 35 kPa |
| Working pressure | Steady : 75 % of full scale Over range protection : 130 % of full scale |
| 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 ±0.6 % per 10 ℃ of full scale |
Standard features
| Pressure connection | Stainless steel (316L SS) |
| Element | Stainless steel (316L SS) Pressure chamber : Up to 35 kPa |
| Case | Stainless steel (304SS) |
| Cover | Stainless steel (304SS) |
| Window | Safety glass |
| Movement | Brass |
| Dial | White aluminium with black graduations |
| Pointer | Black painted aluminium alloy |
| Process connection | ¼”, ⅜”, ½” PT, NPT and PF |
| Certificates | ATEX II 2G Ex h IIC T6…T1 Gb ATEX II 2D Ex h IIIC T85°C….T450°C Db |
| Option | • Internal zero adjustment, only available with diameter 100 mm • Laminate safety glass |
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