The 400 Series is a versatile family of vacuum, pressure, differential pressure and temperature switches for applications that require single or multiple switching capabilities.

Brass bellows with nickel-plated brass 1/4” NPT (female) pressure connection; Models 126 and 134 have zinc-plated steel spring exposed to media

The 400 Series is a versatile family of vacuum, pressure, differential pressure and temperature switches for applications that require single or multiple switching capabilities.

303 stainless steel piston with Buna-N O-Ring and 303 stainless steel 1/4” NPT (female) pressure connection (not recommended for gas service since drying of the O-Ring seal can allow bleeding of medium into the atmosphere)

The 400 Series is a versatile family of vacuum, pressure, differential pressure and temperature switches for applications that require single or multiple switching capabilities.

Teflon® diaphragm and Viton® O-Ring with 316L stainless steel 1/4” NPT (female) pressure connection and cap

The Vanguard WirelessHART, fixed point gas detector is designed to monitor gas emissions in areas with power and signal wire limitations. It significantly reduces engineering and deployment time and costs.

The 400 Series is a versatile family of vacuum, pressure, differential pressure and temperature switches for applications that require single or multiple switching capabilities.

316L stainless steel diaphragm and Viton® O-Ring with 316L stainless steel 1/4" NPT (female) pressure connection

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

E121 - Bulb and capillary; one SPDT; epoxy coated enclosure; external adjustment with reference dial, single conduit

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

Type 820E - Bulb and capillary; one SPDT; external adjustment and temperature indication, dual conduits
Type 822E - Bulb and capillary; two SPDT; external adjustment and temperature indication, dual conduits

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

E122, dual switch, bulb and capillary, external adjustment via reference dial, single conduit

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

F120, single switch, bulb and capillary, internal adjustment, dual conduits

The 400 Series is a versatile family of vacuum, pressure, differential pressure and temperature switches for applications that require single or multiple switching capabilities.

Welded 316L stainless steel bellows and 1/2” NPT (female) pressure connection

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

303 stainless steel piston with Buna N O-Ring and 303 stainless steel 1/4” NPT (female) pressure connection (not recommended
for gas service since drying of the O-Ring seal can allow bleeding of medium into the atmosphere)

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

Brass bellows with nickel-plated brass 1/4” NPT (female) pressure connection; models 126 & 134 have zinc-plated steel spring which is exposed to media

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

Welded 316L stainless steel diaphragm and 1/2” NPT (female) pressure connection, large 0.72” orifice for clean-out purposes. NACE MR0175
compliant with M401 option

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

316L stainless steel diaphragm (optional Hastelloy® C 276 or Monel® 400); Viton® GLT O-Ring (optional Kalrez®,Ethylene Propylene or Aflas®); 316 stainless steel 1/2” NPT (female) pressure connection (optional Hastelloy® C 276 or Monel® 400), 0.72” orifice for clean-out purposes. Models 188 and 189 have a 316L stainless steel 1/2" NPT (female) pressure connection. NACE MR0175 compliant with M401 option

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

Welded 316 stainless steel diaphragm and 1/2” NPT (female) pressure connection, large 0.72” orifice for clean-out purposes. NACE MR0175 compliant with M401 option (except model 194)

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

Phosphor bronze bellows with nickel-plated brass 1/4” NPT (female) pressure connection

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

Welded 316L stainless steel bellows and 1/4” NPT (female) pressure connection

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

Buna N diaphragm and O-Ring with 1/4” NPT (female) aluminum connection and cap

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

316L stainless steel diaphragm (optional Hastelloy® C 276 or Monel® 400); Viton®GLT O-Ring (optional Kalrez®, Ethylene Propylene or Aflas®); 316 stainless steel 1/2” NPT (female) pressure connection (optional Hastelloy® C 276 or Monel® 400), 0.06" orifice to dampen pulsations. Models 488 and 489 have a 316L stainless steel 1/2" NPT (female) pressure connection. NACE MR0175 compliant with M401 option

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

316L stainless steel diaphragm (optional Hastelloy® C 276 or Monel® 400); Viton®GLT O-Ring (optional Kalrez®, Ethylene Propylene or Aflas®); 316 stainless steel 1/2” NPT (female) pressure connection (optional Hastelloy® C 276 or Monel® 400), 0.06" orifice to dampen pulsations. Models 488 and 489 have a 316L stainless steel 1/2" NPT (female) pressure connection. NACE MR0175 compliant with M401 option