Pneumatic Switches

Pneumatic-Electric High/Low Alarm Switch

3-15# In - 2 SPDT Out

The switch is used to provide high and low signal alarm. Two independently adjustable SPDT switches provide 3 to 15 psig high and low alarm contact capability in this single device.

Each 10A switch adjustable between 1 and 27 psig

Part # Pneumatic-Electric High/Low Alarm Switch Price  
R470 2-SPDT P-E Switch [Contact us for a price or a substitute]

Pneumatic-Electric Pressure Switch

3-15# In - Electric Out

For on-off control of electrical devices such as air compressors, fans, pilot lights, etc., by the use of a predetermined air pressure signal.

Part # Switch Differential Price  
PC-110 SPDT 1 to 5 psi adj. $268.00 Add to Order
PC-131 DPST Opens On Rise 1-1/2 to 20 psi adj. [Contact us for a price or a substitute]
PC-132 DPST Opens On Fall 1-1/2 to 20 psi adj. $290.26 Add to Order
PC-141 DPDT 5 psi fixed [Contact us for a price or a substitute]
PC-151 3 SPST Adj. [Contact us for a price or a substitute]

Pressure Controllers

Pressure In - SPDT Floating Out

For the proportional pressure control of steam, air, gases, or liquids.

Part # Range Differential Price  
PP-221 20" Vac to 10# 1 to 3# [Contact us for a price or a substitute]
PP-222 0 to 20# 1 to 3# [Contact us for a price or a substitute]
PP-223 10 to 60# 2-1/2 to 7-1/2# [Contact us for a price or a substitute]
PP-224 50 to 150# 5 to 15# [Contact us for a price or a substitute]
PP-225 100 to 250# 7-1/2 to 22-1/2# [Contact us for a price or a substitute]
PP-226 216 to 360# 7-1/2 to 22-1/2# [Contact us for a price or a substitute]

Pneumatic Flow Switch

The No. FS7-4A is a variation of the No. FS7-4 which substitutes an air valve for the electrical switch. Can be used to control pneumatic operated relays or valves when flow starts or stops. When flow drops below the necessary rate, the air valve opens, bleeding pressure from the control system.

Part # Pneumatic Flow Switch Price  
F40EA-1 Johnson Pneumatic Flow Switch [Contact us for a price or a substitute]
FS7-4A McDonnell-Miller Pneumatic Flow Switch [Contact us for a price or a substitute]

Pneumatic–Electric Switches

P67 models are used to make or break 1 or 2 electrical circuits using a pneumatic signal. Typical uses include control of fans, compressors, and other electrical devices.

Part # Switch Range Diff Price  
P67AA-1 DPST Opens on Fall 3-30# 1-1/2 to 20 $290.26 Add to Order
P67CA-1 DPST Opens On Rise 3-30# 1-1/2 to 20 $305.24 Add to Order

Pneumatic Differential Pressure Switch

Low Pressure In - Pneumatic Out

The PDP300 switch senses the flow of air in ducts or where differential pressure exists. Fan interlocking is very common. It includes a bracket for direct or surface mounting.

Part # Pneumatic Differential Pressure Switch Price  
PDP300 .12 to 2.0" WC-Close High $1,446.99 Add to Order
SP401 4" flanged sensing tube, 2 fittings and gasket $37.38 Add to Order

Air Flow Pressure Switch

Low Pressure In - SPDT Floating Out

These switches are used with reversible electric actuators to control differential pressures, low static pressures, or air velocities in duct systems.

Connection: 3/8'' O.D. Barb

Don’t Forget …
When installing these pressure switches, you’ll need sensing tubes, fittings and tubing.

These switches are designed to be compatible with any brand of pneumatic control system. Replaceable scale plates give you a variety of system functions. Standardizing on these switches will reduce your costs and help you become familiar with a single replacement for all uses.

Part # Range (in WC) Velocity (fpm) Price  
PF-305 -0.5 to +0.5 400 to 2800 $872.00 Add to Order
PF-306 0.2 to 1.3 1800 to 4600 $872.00 Add to Order
PF-307 1.1 to 3.5 4200 to 7500 $872.00 Add to Order
PF-308 3.2 to 10 7200 to 14000 [Contact us for a price or a substitute]

Universal Pneumatic Gradual Switch

This manual switch is used to provide a variable pneumatic signal to any brand of pneumatic device. Used for remote positioning or as a testing device.

Part # Grad Switch Price  
HDO-1101 BLANK, Scale plates not included [Contact us for a price or a substitute]
HDO-1102 0 to 100%, Scale plates not included $7.34 Add to Order
HDO-1103 Increase CW Arrow, Scale plates not included [Contact us for a price or a substitute]
YMC-1001 Pne. Grad. Switch [Contact us for a price or a substitute]

2 Position Pneumatic Selector Switches

This manual selector switch is used to direct one or two signals to either one of two ports. Ten scale plates available to perform a variety of functions. Vented and non-vented models are available.

Part # 2-Pos Selector Switch Price  
HDO-1201 Occ-Unocc, Scale plates not included $7.34 Add to Order
HDO-1202 Summer-Winter, Scale plates not included [Contact us for a price or a substitute]
HDO-1203 On-Off, Scale plates not included $7.34 Add to Order
HDO-1205 Open-Close, Scale plates not included [Contact us for a price or a substitute]
HDO-1206 1-2, Scale plates not included $7.34 Add to Order
HDO-1207 Day-Night, Scale plates not included $7.34 Add to Order
HDO-1208 Heat-Cool, Scale plates not included [Contact us for a price or a substitute]
HDO-1209 Manual-Auto, Scale plates not included [Contact us for a price or a substitute]
YMC-2001 DPDT-Non-Vented [Contact us for a price or a substitute]
YMC-2002 DPDT-Vented [Contact us for a price or a substitute]

3 Position Pneumatic Selector Switches

This manual selector switch is used to switch a pneumatic signal to one of three ports. Eight scale plates available to perform a variety of functions. Vented and non-vented models available.

Part # 3-Pos Selector Switch Price  
HDO-1301 1-2-3, Scale plates not included [Contact us for a price or a substitute]
HDO-1302 On-Auto-Off, Scale plates not included $7.34 Add to Order
HDO-1303 Day-Auto-Night, Scale plates not included $7.34 Add to Order
HDO-1305 Heat-Auto-Cool, Scale plates not included [Contact us for a price or a substitute]
HDO-1306 Summ.-Auto-Wint., Scale plates not included [Contact us for a price or a substitute]
HDO-1307 Open-Auto-Close, Scale plates not included $7.34 Add to Order
YMC-3001 3 Position Non-Vent [Contact us for a price or a substitute]
YMC-3002 3 Position Vented [Contact us for a price or a substitute]

6 Position Pneumatic Selector Switch

This manual selector switch can be used to switch a pneumatic signal to one of six ports. It’s economical cost make it a good choice for any multiple switching function of six or less positions.

Part # 6-Pos Selector Switch Price  
HDO-1601 1-2-3-4-5-6, Scale plates not included $7.34 Add to Order
YMC-6001 6-Pos. Non-Vented [Contact us for a price or a substitute]
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