NPSM Flowmeters | McMaster-Carr

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11 Products

Socket-Connect Flowmeter/Totalizers with Remote Display

Often used in hard-to-access areas, these flowmeter/totalizers have a display that can be placed up to 25 feet from the sensor. Use them to measure the rate and volume of liquid flowing through your system. They measure flow by counting how many times their turbine turns as liquid flows through. To avoid clogging the turbine and other damage to the sensor, use them only with clean, low-viscosity liquids. Batch totals are resettable but can be protected with a security code to prevent tampering. The reset function can also be disabled so that they operate as a cumulative totalizer. Cumulative totals cannot be reset. No matter the mounting orientation, they’ll measure flow correctly.

These flowmeter/totalizers are calibrated with water. You can use them with other liquids, but they may not measure accurately if the liquid’s viscosity differs from water.

For a complete unit, you’ll need a display, a sensor, and a tee fitting.

Sensors

Sensors thread onto the tee fitting.

	Sensors									Replacement Flowmeter Rotors		Replacement Flowmeter Rotor Pins
					Temp., ° F
	Connections	End-to-End Lg.	Accuracy	Max. Pressure @ Temp.	Min.	Max.	Mounting Position		Each		Each		Each
Polypropylene Body



		1 1/4 NPSM	4.1"	±1%	180 psi @ 70° F	33	149	Any Angle	4114K222	0000000	4114K98	000000	4114K99	000000

Tee Fittings

Tee fittings mount inline with your pipe. They have two unthreaded socket ends that bond to unthreaded PVC pipe with PVC cement and primer.

						Temp., ° F
	Inlet/Outlet Connection	Sensor Connection	Pipe Schedule	Flow, gpm	Max. Pressure @ Temp.	Min.	Max.	Mounting Position		Each
PVC Body



		1/2 Socket Connect Female Inlet Pipe × 1/2 Socket Connect Female Outlet Pipe	1 1/4 NPSM Threaded Male Pipe	80	1 to 18.9	180 psi @ 70° F	33	149	Any Angle	4114K231	0000000


		3/4 Socket Connect Female Inlet Pipe × 3/4 Socket Connect Female Outlet Pipe	1 1/4 NPSM Threaded Male Pipe	80	1.7 to 33.2	180 psi @ 70° F	33	149	Any Angle	4114K232	000000
		1 Socket Connect Female Inlet Pipe × 1 Socket Connect Female Outlet Pipe	1 1/4 NPSM Threaded Male Pipe	80	2.7 to 53.9	180 psi @ 70° F	33	149	Any Angle	4114K233	000000
		1 1/2 Socket Connect Female Inlet Pipe × 1 1/2 Socket Connect Female Outlet Pipe	1 1/4 NPSM Threaded Male Pipe	80	6.4 to 126.9	180 psi @ 70° F	33	149	Any Angle	4114K235	000000
		2 Socket Connect Female Inlet Pipe × 2 Socket Connect Female Outlet Pipe	1 1/4 NPSM Threaded Male Pipe	80	10.5 to 209.2	180 psi @ 70° F	33	149	Any Angle	4114K236	000000
		3 Socket Connect Female Inlet Pipe × 3 Socket Connect Female Outlet Pipe	1 1/4 NPSM Threaded Male Pipe	80	23 to 460.8	180 psi @ 70° F	33	149	Any Angle	4114K238	000000

Air-Pressure-Actuated HVAC Switches

Often used to detect clogged air filters and iced air conditioner coils, these switches sense small changes in pressure between two points in your duct.

	Accuracy, in. H₂O	Temp. Range, ° F	Current @ Voltage	Electrical Connection Type	Switch Designation	Max. Pressure, psi	Low Pressure Side Connection	High Pressure Side Inside Connection	High Pressure Side Outside Connection	For Use Outdoors	Enclosure Rating	Certification		Each
Diaphragm Sensors



	0.05 to 5	0.025	-40 to 165	2.9 amp @ 240V AC 5.8 amp @ 120V AC	Hardwire	SPDT	1	1/8 NPT Female	1/8 NPT Female	1/2 NPSM	No	NEMA 1	CSA Certified, UL Listed	1795K1	0000000


	0.05 to 5	0.04	-40 to 165	4.9 amp @ 240V AC 9.8 amp @ 120V AC	Hardwire	SPDT	1	1/8 NPT Female	1/8 NPT Female	1/2 NPSM	No	NEMA 1	CSA Certified, UL Listed	1795K6	000000