P991 explosion proof type differential switch series are bellows type, and these are primarily used for detecting the draft pressure in thermal power plants.
| Fluid | Air and gas | 
| Repeatability | ±1.5 % of full range | 
| Dead band | Fixed. 0.25 ~ 0.8 kPa or less | 
| Differential pressure range (kPa) | 0 ~ 4 kPa to 0 ~ 20 kPa | 
| Static pressure | 500 kPa | 
| Working temperature | Ambient : -20 ~ 65 °C Fluid : Max. 60 °C
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| Degress of protection | EN60529/IEC529/min IP65 | 
| Pressure connection | Stainless steel (316L SS) | 
| Element | Bellows : Stainless steel (316L SS) Gasket : PTFE
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| Mounting | Surface wall mounting | 
| Setpoint adjustment | Internal | 
| Contact | One SPDT Two SPDT (Only available with single setpoint)
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| Contact rating | SPDT contact rating AC 125 V / 250 V, 15 A
 DC 125 V, 0.4 A for resistance load
 DC 125V, 0.03 A for inductive load
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| Conduit connection | ¾" PF (F) | 
| Process connection | ¼" NPT (F) | 
| Operating environment | Hazardous area refer to the explosion-proof item for information | 
| Certificates | KCS Ex d IIC T6 | 
| Option | 3-way manifold valve 5-way manifold valve
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| Hersteller |  | 
 
Datenblatt: 
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