Adjustable Pressure Switch Cross-Reference - PresAir

on January 16, 2024

At Presair, we are pleased to provide you with a technical adjustable pressure switch cross-reference guide. This guide assists you in comparing our products with those of notable competitors like Tecmark, Herga, and Lefoo.

Features of Presair Adjustable Pressure Switches

Presair adjustable pressure switches offer straightforward electrical on/off control over pressures. As pressure increases, one contact opens while the other closes, providing an ideal solution for monitoring, controlling, and notifying. These switches are field adjustable but can also be preset at the factory if preferred. Additionally, dual switches are available, factory set to operate two separate microswitches at different pressure settings. With multiple body styles, these switches offer the necessary versatility for various air hose connections.

For more details, view the product page. To purchase, click here.

Competitor Comparison

This guide includes the following models:

Tecmark: 3000, 3900, 4000, VTBS3000, V4000 series
Herga: 6731, 6732, 6741, and 6742 series
Lefoo: LF25 series

Whether you are an experienced technical professional or exploring alternatives, our cross-reference guide helps you find the right match for your needs.

Adjustable Pressure Switch Cross-Reference

Manufacturer	Presair	Tecmark	Herga	Lefoo
Product Name	P Series	3000,3900,4000,VTBS3000,V4000	6731, 6732, 6741 & 6742 Series	LF25
Mounting Styles & Air Connections	1/8 NPT, 9/16″-18 UNF Thread Mount w/ 1/8 NPT, 1/4 NPT, Radial Mount with Side Air Spout, Direct Mount with Center Air Spout	1/8” NPT male, 1/4” NPT male, 3/16” barbed, 1/8”, 3/16” or 1/4” compression	1/5″ (5.08mm), 1/8″ BSPT / NPT BRASS	NPT 1/8-27 or NPT 1/4-18 male, G 1/8 male
Construction	Plastic	Plated Steel, Plastic	Plastic, Steel, Brass	Plastic, Steel Plating
Diaphragm Material Options	Nitrile, EPDM, Silicone	Nitrile, EPDM	Urethane	Nitrile, EPDM, FVMQ
Function	Open or Close on Pressure Rise or Fall	Open or Close on Pressure Rise or Fall	Open or Close on Pressure Rise or Fall	Open or Close on Pressure Rise or Fall
Pressure Range	2.50 inches of water to 125 PSI	2″WC to 100 PSI	1.50 inches of water to 120 PSI	3 psi to 130 [so
Max. Proof Pressure	200 PSI	120 PSI	150 PSI	145 psi
Contact Configuration	Single Pole, Single Throw (SPST); Single Pole, Double Throw (SPDT); Double Pole, Double Throw (DPDT)	SPST, SPDT, DPST, or DPDT	SPST, DPDT	SPST OR SPDT
+100,000 Max. Resistive Cycle Rating @120VAC	25 Amps	25 Amps	21A	16A
Certifications	UL, cUL RoHS & REACH Compliant	UL, cUL RoHS & REACH Compliant	UL(508 Specific models only), RoHS & REACH	UL, CUL, RoHS REACH
Country of Origin	USA	USA	UK	China

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Your Part Number	Our Part Number	Item Description	Buy Now
6731 Series & 6732 Series	Adjustable Pressure Switches	Adjustable low pressure switches Range: 1.5 inches of water to 16 psig Switch Rating: 21A@250VAC	Contact Us
6741 Series & 6742 Series	Adjustable Pressure Switches	Adjustable medium pressure switches Range: 1.5 Psi to 125 Psi Switch Rating: 21A@250VAC	Contact Us
3000 Series	Adjustable Pressure Switches	Adjustable pressure switches Range: 2 inches of water to 100 psi Switch Rating: 21A@250VAC	Contact Us
3900 Series	Adjustable Pressure Switches	Adjustable pressure switches Range: 6 inches of water to 5 psi Switch Rating: 21A@250VAC	Contact Us
4000 Series	Adjustable Pressure Switches	Adjustable pressure switches Range: 6 inches of water to 5 psi Switch Rating: 21A@250VAC	Contact Us
PSW21A	PM10103E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 3-7 inches of water rising Switch Rating: 3A@250VAC (resistive)	Contact Us
PSW21B	PM10306A	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 5-35 inches of water rising Switch Rating: 5A@250VAC (resistive)	Contact Us
PSW21C	PM11120E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 1-6 Psig Rising Switch Rating: 21A@250VAC (resistive)	$44.95
PSW21D	PM12540E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 4-11 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21E	PM12550E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 9-18 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21F	PM12560E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 15-28 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21G	PM12570E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 25-40 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21H	PM12580E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 35-65 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21J	PM12590E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 50-100 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21K	PM12595E	Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 75-120 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21BD	PM21306E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 5-35 inches of water rising Switch Rating: 5A@250VAC (resistive)	Contact Us
PSW21CD	PM21120E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 1-6 Psig Rising Switch Rating: 21A@250VAC (resistive)	$49.95
PSW21DD	PM22540E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 4-11 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21ED	PM22550E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 9-18 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21FD	PM22560E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 15-28 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21GD	PM22570E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 25-40 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21HD	PM22580E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 35-65 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21JD	PM22590E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 50-100 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW21KD	PM22595E	Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut Range: 75-120 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW22A	PT10103A	Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 3-7 inches of water rising Switch Rating: 3A@250VAC (resistive)	Contact Us
PSW22B	PT10306A	Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 5-35 inches of water rising Switch Rating: 5A@250VAC (resistive)	Contact Us
PSW22C	PT11120A	Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 1-6 Psig Rising Switch Rating: 21A@250VAC (resistive)	Contact Us
PSW22D	PT12540A	Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 4-11 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW22E	PT12550A	Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 9-18 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW22F	PT12560A	Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 15-28 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW22BD	PT21306A	Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 5-35 inches of water rising Switch Rating: 5A@250VAC (resistive)	Contact Us
PSW22CD	PT21120A	Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 1-6 Psig Rising Switch Rating: 21A@250VAC (resistive)	Contact Us
PSW22DD	PT22540A	Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 4-11 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW22ED	PT22550A	Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 9-18 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us
PSW22FD	PT22560A	Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut Range: 15-28 Psig Rising Switch Rating: 25A@250VAC (resistive)	Contact Us

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Pneumatic Switches

Presair pneumatic switches are great for safe, economical control of consumer, industrial, medical or other products and appliances in wet, chemical or explosive atmospheres, or just for added safety.

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Products are designed & manufactured in Eau Claire, Wisconsin, USA.

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