12 Series
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PRESSURE, VACUUM, DIFFERENTIAL PRESSURE, AND TEMPERATURE SWITCHES PRESSURE, DIFFERENTIAL PRESSURE, AND TEMPERATURE SWITCHES DUAL SEAL CERTIFIED • 316 Stainless Steel Construction withstands the harshest environments • Hermetically Sealed Micro-switch • Vibration Resistant Belleville provides set point stability • UL, cUL, ATEX and IECEx approved • Dual Seal provides process sealing between electrical system and combustible process fluids LEADERS IN SAFETY, ALARM & SHUTDOWN

12 Series hazardous location switches are ideal for operation in tough applications where space is at a premium. A snap-action Belleville spring assembly is used in most models to provide vibration resistance and prolonged switch life. The 316 stainless steel enclosure and hermetically sealed switch provide rugged protection from the environment. Approved for use in hazardous locations worldwide, the 12 Series is installed within applications ranging from offshore oil rigs to rotating equipment, and more. • UL, cUL, ATEX and IECEx approved for Div. 1 or Zone 1 hazardous locations; CE...

WORLDWIDE COMPLIANCE Quadruple approvals (UL, cUL, ATEX and IECEx) mean the 12 Series meets the demanding requirements of critical applications within hazardous locations. Additionally, the 12 Series complies with ANSI/ISA 12.27.01, "secondary seal requirements for process sealing between electrical systems and flammable or combustible process fluids," and NEC 501.17, "process sealing." It can be used in a variety of applications where space is at a premium. Metal wetted parts comply with NACE MR0175 and the 316 stainless steel, type 4X enclosure rating assure long-term performance in the...

SPECIFICATIONS OPERATING AMBIENT TEMPERATURE MEDIA TEMPERATURE -58 to 176°F (-50 to 80°C); Sensor Type K: 0°F to 160°F (-18°C to 71°C). Set point shifts less than 1% of range for a 50°F (28°C) ambient temperature change. Slight ambient effects for 25-50’ extra capillary length on temperature switch models, consult factory. Pressure models: Sensor types 2, 7, 9: -50 to 400°F (-45 to 204°C) Sensor types 3, 4, 8: -20 to 200°F (-28 to 93°C) Sensor types 5, 6: 0 to 320°F (-18 to 160°C) Sensor type P, W: 0 to 200°F (-18 to 93°C); 20 to 250°F (-7 to 121°C) for optional Viton sensor Differential...

Bulb and capillary: Non-toxic oil fill; 6 feet 304 stainless steel. Optional lengths available Immersion Stem: 316 stainless steel TEMPERATURE DEADBAND Typically 2% of range under laboratory conditions (70°F ambient circulating bath at a rate of 1/2°F per minute change) PRESSURE CONNECTION 1/2" NPT (female) or 1/4" NPT (female). Differential pressure: 1/8" NPT (female) Optional pressure connection materials available, see page 12. Pressure: May be pipe mounted or bracket mounted using kit 62169-13 Differential Pressure: Should be mounted using 2 mounting holes on attached mounting bracket...

MODEL CHART Model Adjustable Set Point Range Lower end of range on fall; High end of range on rise Over Range Pressure* Proof Pressure** Sensor Type 2, 316 stainless steel 1/2” NPT (female) pressure connection and welded diaphragm, 23/32” orifice for clean out purposes. High proof pressure. Not recommended for high cycling applications. Belleville actuation. (NACE MR0175 compliant with M401 option) psi A B C D E F G Sensor Type 3, 316L stainless steel 1/2” NPT (female) pressure connection, Teflon® coated Polyimide (Kapton®) diaphragm, Buna N O-ring, 1/2” orifice for clean out purposes....

Adjustable Set Point Range Over Range Pressure* Lower end of range on fall; High end of range on rise Proof Pressure** Sensor Type 5, 316L stainless steel 1/2” NPT (female) pressure connection and diaphragm, Viton® O-ring, 1/2” orifice for clean out purposes. Belleville actuation. (NACE MR0175 compliant with M401 option) Sensor Type 6, 316L stainless steel 1/4” NPT (female) pressure connection and diaphragm, Viton® O-ring, 1/8” orifice. Belleville actuation. (NACE MR0175 compliant with M401 option) psi A B C D E F G H Sensor Type 7, 1/2” 316L stainless steel NPT (female) pressure connection...

MODEL CHART Model Adjustable Set Point Range Over Range Pressure* Lower end of range on fall; High end of range on rise Proof Pressure** Sensor Type 9, 316L stainless steel 1/2” NPT (female) pressure connection and welded diaphragm. Large 23/32” orifice for clean-out purposes. Non-Belleville actuation. (NACE MR0175 compliant with M401 option) psi A B C mbar (unless noted) Sensor Type P, 316 stainless steel piston and Buna N O-Ring with 316 stainless steel 1/4" NPT (female) pressure connection. Non-Belleville actuation. (NACE MR0175 compliant with M401 option) psi 0 1 2 3 4 Sensor Type P,...

DIFFERENTIAL PRESSURE MODEL CHART Model Adjustable Set Point Range Working Pressure Range*** Lower end of range on fall; High end of range on rise Proof Pressure** Sensor Type K, Buna N diaphragm and sealing diaphragms with epoxy coated aluminum housing and 1/8” NPT (female) pressure connections. Non-Belleville actuation. 303/304 stainless steel mounting bracket attached. SPDT Switch (single pole double throw)‡ "wcd mbar "wc mbar Sensor Type K, Buna N diaphragm and sealing diaphragms with epoxy coated aluminum housing and 1/8” NPT (female) pressure connections. Non-Belleville actuation....

HOW TO ORDER Select letter or number "codes" to construct part number Part # Housing Electrical Switch Electrical Sensor Material Rating Output Conduit Type ORDERING CODE SERIES 12 DESIGNATION 12 Designation for 12 series product line HOUSING MATERIAL S 316 Stainless Steel ELECTRICAL RATING* L 1 amp H 5 amp SWITCH OUTPUT S SPDT D DPDT. Available for pressure models only. ELECTRICAL CONDUIT N 1/2" NPT male M M20 metric thread SENSOR TYPE (Belleville actuated unless noted) 2 Welded 316 stainless steel diaphragm, 1/2” NPT (female) pressure connection 3 Teflon® coated Polyimide (Kapton®)...