Instruments

Series III
pressure blade 1

Series III Factory Set Variable Differential Pressure & Vacuum Switches with Snap Action Contacts

Set Points from 2 to 70 psi and 2" to 22" Hg

The Series III switch is a customisable switch built per customer specifications. It features a non-ferrous chamber and excellent set point integrity at extreme temperatures. The exclusive snap switch features: Low-contact resistance, wiping action, fast transfer time, gold over silver contacts, and an adjustable differential. It’s been thoroughly tested for shock and vibration resistance and is particularly valuable in applications where hysteresis, fast transfer time, and low contact resistance are vital.

Pressure Switch Standard Specifications
Type: Snap action switch
Set Point: Factory set
Pressure: 1-70 PSI
Operating Pressure: 200 PSI
Proof Pressure: 350 PSI
Burst Pressure: 500 PSI
Ratings
Resistive: 15 AMP- 6 VDC
8 AMP- 12 VDC
4 AMP- 24 VDC
Inductive: 1 AMP- 120 VAC
0.5 AMP- 240 VAC
Dry circuits
Diaphragm: Beryllium copper
Temperature Range: -40° F to + 250° F
Connector:1/8 -27 PTF SAE short male thread
Terminals: 8" Wire leads-18 ga.
Circuitry: SPST-N.O. or N.C., SPDT
Base: Brass
Housing: Die cast zinc
Options: Silver contacts, silver soldered base
Terminations: Wire leads with wide selection of Cannon, Packard, AMP, and others available
Connectors: 1/4" and 3/8" PTF SAE short; 1/2-20 UNF (o-ring fitting); 3/8- 24 UNF (3/16" tube); 7/16-24 UNF (1/4" tube); and metric
Pressure Swtich/Factory Set
Reference #Set Point RangeDifferential
1200002-4 PSI1-1.5 PSI
1200014-12 PSI2-6 PSI
12000212-24 PSI8-12 PSI
12000324-40 PSI10-18 PSI
12000440-70 PSI15-20 PSI
Vacuum Switch/Factory Set
Reference #Set Point RangeDifferential
12000515-36" H2O4-12" H2O
1200062-6" Hg0.4-1" Hg
1200076-12" Hg0.4-1" Hg
12000812-22" Hg0.6-1.5" Hg

Specify:
1. Set Point
2. Actuate on increasing or decreasing pressure
3. SPST N.O. or N.C., SPDT

Vacuum Switch Standard Specifications
Type: Snap action switch
Set Point: Factory set
Vacuum: 2 to 22" Hg
15 to 36" H2O
Operating Pressure: 200 PSI
Proof Pressure: 350 PSI
Burst Pressure: 500 PSI
Ratings:
Resistive: 15 AMP- 6 VDC
8 AMP- 12 VDC
4 AMP- 24 VDC
Inductive: 1 AMP- 120 VAC
0.5 AMP- 240 VAC
Dry circuits
Diaphragm: Silicone rubber
Temperature Range: -40° F to + 250° F
Connector: 1/8 -27 PTF SAE short male thread
Terminals: 8" Wire leads-18 ga.
Circuitry: SPST-N.O. or N.C., SPDT
Base: Brass
Housing: Die cast zinc
Options: Silver contacts, silver soldered base, fluorosilicone rubber diaphragm
Terminations: Wire leads with wide selection of Cannon, Packard, AMP, and others available
Connectors: 1/4" and 3/8" PTF SAE short; 1/2-20 UNF (o-ring fitting); 3/8-24 UNF (3/16" tube); 7/16-24 UNF (1/4" tube); and Metric