PRODUCT SPECIFICATIONS > INSTRUMENTATION
| Clark Solutions 120 Series, Pressure, Vacuum, Diff. Pressure & Temp. Switches Explosion Proof, Adjustable Ranges 30" Vac to 6000 PSI, -180°F to 650°F (Page 3 of 9)
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| Range/Material Code | Adjustable Set Point Range High end of range on rise, low end on fall | Deadband | *Over Range Pressure | **Proof Pressure | ||||
| psi Unless noted | bar | psi Unless noted | bar | psi | bar | psi | bar | |
| Brass bellows with 1/4" NPT (female) nickel-plated brass pressure connection; Models 126 & 134 have zinc-plated steel spring exposed to media | ||||||||
| 126 | 30 to 3" Hg Vac | -1 to 0.1 | 0.2" to 0.6" Hg | 0.01 to 0.02 | 80"wc | 0.2 | 5 | 0.3 |
| 134 | 30" Hg Vac to 20 psi | -1 to 1.4 | 0.2" to 6" Hg | 0.01 to 0.02 | 20 | 1.4 | 25 | 1.7 |
| 137 | 15 to 80"wc | 0.04 to 0.19 | 2 to 6"wc | 0.01 to 0.02 | 80"wc | 0.2 | 5 | 0.3 |
| 144 | 0.5 to 20 | 0.04 to 1.4 | 0.1 to 0.3 | 0.01 to 0.02 | 20 | 1.4 | 25 | 1.7 |
| 152 | 1 to 50 | 0.07 to 3.4 | 0.1 to 0.5 | 0.01 to 0.03 | 50 | 3.4 | 75 | 5.2 |
| 156 | 2 to 100 | 0.14 to 6.9 | 0.2 to 0.6 | 0.01 to 0.04 | 100 | 6.9 | 125 | 8.6 |
| 164 | 4 to 200 | 0.3 to 13.8 | 0.2 to 1 | 0.01 to 0.01 | 200 | 13.8 | 200 | 13.8 |
| Phosphor bronze bellows with 1/4" NPT (female) nickel-plated brass pressure connection | ||||||||
| 270 | 4 to 200 | 0.3 to 13.8 | 1 to 4 | 0.07 to 0.3 | 200 | 13.8 | 250 | 17.2 |
| 274 | 6 to 300 | 0.4 to 20.7 | 1 to 5 | 0.07 to 0.3 | 300 | 20.7 | 350 | 24.1 |
| Welded 316L stainless steel bellows and 1/4" NPT (female) pressure connection | ||||||||
| 356 | 15 to 100 | 1.0 to 6.9 | 0.7 to 1.8 | 0.05 to 0.1 | 100 | 6.9 | 800 | 55.2 |
| 358 | 15 to 200 | 1.0 to 13.8 | 1 to 3 | 0.07 to 0.2 | 200 | 13.8 | 800 | 55.2 |
| 361 | 20 to 300 | 1.4 to 20.7 | 1 to 4 | 0.07 to 0.3 | 300 | 20.7 | 800 | 55.2 |
| 376 | 25 to 500 | 1.7 to 34.5 | 1.5 to 5 | 0.1 to 0.3 | 500 | 34.5 | 800 | 55.2 |
| 303 stainless steel piston and Buna-N O-Ring with 1/4" (female) pressure connection ( not recommended for gas service since drying of the O-Ring seal can allow bleeding of medium into the atmosphere) | ||||||||
| 612 | 125 to 3,000 | 8.6 to 206.8 | 40 to 250 | 2.8 to 17.2 | 6,000 | 413.7 | 10,000 | 689.5 |
| 616 | 700 to 5000 | 48.3 to 344.7 | 40 to 375 | 2.8 to 25.9 | 6,000 | 413.7 | 10,000 | 689.5 |
| 316 stainless steel bellows and 1/4" NPT (female) pressure connection (not recommended for rapid or high cycling pressure changes) | ||||||||
| 680 | 100 to 1700 | 6.9 to 117.2 | 9 to 40 | 0.6 to 2.8 | 1700 | 117.2 | 2500 | 172.4 |
| Buna-N diaphragm and O-Ring with 1/4" NPT (female) nickel-plated brass pressure connection; Optional Viton® diaphragm & O-Ring available for code 704-705 | ||||||||
| 701 | 1.5 to 30 | 0.1 to 2.1 | 1 to 2 | 0.07 to 0.14 | 500 | 34.5 | 1000 | 68.9 |
| 702 | 3 to 100 | 0.2 to 6.9 | 1 to 4 | 0.07 to 0.3 | 500 | 34.5 | 1000 | 68.9 |
| 703 | 9 to 300 | 0.6 to 20.7 | 1 to 5 | 0.07 to 0.3 | 500 | 34.5 | 1000 | 68.9 |
| 704 | 15 to 500 | 1.0 to 34.5 | 2 to 8 | 0.14 to 0.6 | 1500 | 103.4 | 2500 | 172.4 |
| 705 | 30 to 1000 | 2.1 to 68.9 | 3 to 20 | 0.21 to 1.4 | 1500 | 103.4 | 2500 | 172.4 |
| Buna-N diaphragm and O-Ring with 1/4" NPT (female) aluminum pressure connection and cap | ||||||||
| 450 | 30" to 3" Hg Vac | -1.0 to -0.1 | 0.1 to 0.3"Hg | 0.003 to 0.1 | 80"wc | 0.2 | 225 | 15.5 |
| 451 | 2 to 80"wc | 0.005 to 0.2 | 0.8 to 2"wc | 0.002 to 0.005 | 80"wc | 0.2 | 225 | 15.5 |
| 452 | 30" Hg Vac to 20 psi | -1 to 1.4 | 0.1 to 0.4" Hg | 0.003 to 0.01 | 20 | 1.4 | 225 | 15.5 |
| 453 | 0.5 to 20 | 0.03 to 1.4 | 0.05 to 0.1 | 0.003 to 0.01 | 20 | 1.4 | 225 | 15.5 |
| 454 | 0.8 to 30 | 0.06 to 2.1 | 0.05 to 0.2 | 0.003 to 0.014 | 30 | 2.1 | 225 | 15.5 |
| Teflon® diaphragm and O-Ring with 1/4" NPT (female) 316L stainless steel pressure connection and cap | ||||||||
| 550 | 30" to 3" Hg Vac | -1 to 0.1 | 0.1 to 0.4" Hg | 0.003 to 0.01 | 80"wc | 0.2 | 225 | 15.5 |
| 551 | 2 to 80"wc | 0.005 to 0.2 | 1 to 4"wc | 0.003 to 0.01 | 80"wc | 0.2 | 225 | 15.5 |
| 552 | 30" Hg Vac to 20 psi | -1 to 1.4 | 0.2 to 0.5" Hg | 0.007 to 0.02 | 20 | 1.4 | 225 | 15.5 |
| 553 | 0.5 to 20 | 0.03 to 1.4 | 0.1 to 0.2 | 0.007 to 0.014 | 20 | 1.4 | 225 | 15.5 |
| 554 | 0.8 to 30 | 0.06 to 2.1 | 0.1 to 0.3 | 0.007 to 0.02 | 30 | 2.1 | 225 | 15.5 |
| 555 | 2 to 100 | 0.14 to 6.9 | 0.2 to 0.4 | 0.014 to 0.03 | 100 | 6.9 | 225 | 15.5 |
| *Over Range Pressure: The maximum pressure that may be applied continuously without causing damage and maintaining set point repeatability | ||||||||
| ** Proof Pressure: The maximum pressure to which a pressure sensor may be occasionally subjected, which causes no permanent damage. Unit may require calibration. | ||||||||
| Range/Material Code | Adjustable Set Point Range | Deadband | **Proof Pressure | Dial Divisions | |||
| psi | bar | psi | bar | psi | bar | psi | |
| Welded 316L stainless steel bellows with 1/2" NPT (female) pressure connection | |||||||
| S126B | 30" Hg Vac to 0 | -1 to 0 | 0.2 to 0.9" Hg | 7 to 30.5 mbar | 5 | 0.3 | 0.5" Hg |
| S134B | 30" Hg Vac to 20 | -1 to 1.4 | 0.2 to 1.2" Hg | 7 to 40.6 mbar | 25 | 1.7 | 1" Hg & 0.5 psi |
| S137B | 2 to 80"wc | 0.005 to 0.2 | 2 to 10"wc | 5 to 20 mbar | 5 | 0.3 | 2"wc |
| S144B | 0 to 20 | 0 to 1.4 | 0.1 to 0.5 | 7 to 34.5 mbar | 25 | 1.7 | 0.5 |
| S146B | 0 to 30 | 0 to 2.1 | 0.1 to 0.6 | 6.9 to 41.4 mbar | 40 | 2.78 | 0.5 |
| S156B | 0 to 100 | 0 to 6.9 | 0.2 to 0.8 | 13.8 to 55.2 mbar | 125 | 8.6 | 2 |
| S164B | 0 to 200 | 0 to 13.8 | 0.3 to 2 | 20.7 to 138 mbar | 200 | 13.8 | 5 |
| Brass bellows with 1/4" NPT (female) nickel-plated brass pressure connection; Models 126 & 134 have zinc-plated steel spring exposed to media | |||||||
| 126 | 30" Hg Vac to 0 | -1 to 0 | 0.2" to 0.9" Hg | 7 to 30.5 mbar | 5 | 0.3 | 0.5" Hg |
| 134 | 30" Hg Vac to 20 psi | -1 to 1.4 | 0.2" to 1.2" Hg | 7 to 40.6 mbar | 25 | 1.7 | 1" Hg & 0.5 psi |
| 137 | 2 to 80"wc | 0.005 to 0.2 | 2 to 10"wc | 5 to 20 mbar | 5 | 0.3 | 2"wc |
| 144 | 0 to 20 | 0 to 1.4 | 0.1 to 0.5 | 6.9 to 34.5 mbar | 25 | 1.7 | 0.5 |
| 146 | 0 to 30 | 0 to 2.1 | 0.1 to 0.6 | 6.9 to 41.4 mbar | 40 | 2.8 | 0.5 |
| 156 | 0 to 100 | 0 to 6.9 | 0.2 to 0.8 | 13.8 to 55.2 mbar | 125 | 8.6 | 2 |
| 164 | 0 to 200 | 0 to 13.8 | 0.3 to 2.0 | 20.7 to 138 mbar | 200 | 13.8 | 5 |
| Welded 316L stainless steel bellows and 1/4" NPT (female) pressure connection | |||||||
| 358 | 0 to 200 | 0 to 13.8 | 1.5 to 8 | 0.1 to 0.6 | 250 | 17.2 | 5 |
| 361 | 0 to 300 | 0 to 20.7 | 2 to 9 | 0.1 to 0.6 | 350 | 24.1 | 10 |
| 376 | 0 to 500 | 0 to 34.5 | 3 to 12 | 0.2 to 0.8 | 575 | 39.6 | 10 |
| 303 stainless steel piston and Buna-N O-Ring with 1/4" (female) pressure connection ( not recommended for gas service since drying of the O-Ring seal can allow bleeding of medium into the atmosphere | |||||||
| 612 | 200 to 3000 | 13.8 to 207 | 40 to 250 | 2.8 to 17.2 | 10000 | 689.5 | 50 |
| 614 | 500 to 6000 | 34.5 to 413.7 | 50 to 400 | 3.4 to 27.6 | 10000 | 689.5 | 100 |
| ** Proof Pressure: The maximum pressure to which a pressure sensor may be occasionally subjected, which causes no permanent damage. Unit may require calibration. | |||||||
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