E31926 Flow Switches | McMaster-Carr

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36 Products

Fixed-Set-Point Flow Switches


Style B	Style C	Style D	Style E

Since they come factory set to a specific set point, these switches are easier to install than adjustable flow switches. As flowing liquid pushes an internal piston, the switch reads the position of the piston to measure the flow. When the piston passes the set point, the switch actuates. They’re accurate in any mounting position.

These switches are calibrated with and measure water accurately. They can also be used with other liquids by applying your liquid’s specific-gravity conversion factor to calculate the new set point.

Choose a fitting material that is compatible with the liquid you intend to run through your line.

Straight


Style B	Style C

316 Stainless Steel Fitting and Bronze Fitting—Bronze and 316 stainless steel fittings resist impact better than plastic fittings.

Polypropylene Fitting—Polypropylene and PPS fittings work with a wide range of chemicals. However, they can crack from impact or when overtightened.

SPDT—SPDT (single pole, double throw) switches can either turn one device from off to on (normally open) or from on to off (normally closed).

SPST—SPST (single pole, single throw) switches turn one device from off to on (normally open).

										Conduit
	Style	Pipe Size	Thread Type	Gender	Set Point, gpm	Approx. Difference Between Set Point and Reset Point, gpm	Max. Pressure @ Temp.	Temp. Range, ° F	Max. Switching Current @ Voltage	Trade Size	Thread Type	Gender	End-to-End Lg.	Mounting Position		Each
Polypropylene Body with Polypropylene Fittings







				SPST

				B	3/8	NPT	Male	0.25	0.05	125 psi @ 70° F	33 to 212	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	—	—	—	4"	Any Angle	42015K21	000000


				B	3/8	NPT	Male	0.5	0.1	125 psi @ 70° F	33 to 212	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	—	—	—	4"	Any Angle	42015K22	00000
				B	3/8	NPT	Male	1	0.2	125 psi @ 70° F	33 to 212	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	—	—	—	4"	Any Angle	42015K23	00000
				B	3/8	NPT	Male	1.5	0.3	125 psi @ 70° F	33 to 212	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	—	—	—	4"	Any Angle	42015K24	00000
				B	3/8	NPT	Male	2	0.4	125 psi @ 70° F	33 to 212	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	—	—	—	4"	Any Angle	42015K25	00000


				Bronze Body with Bronze Fittings







								SPDT

								C	1	NPT	Female	0.5	0.075	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T211	000000


								C	1	NPT	Female	1	0.15	300 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 3/8"	Any Angle	4553N11	000000
								C	1	NPT	Female	2	0.3	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T212	000000
								C	1	NPT	Female	3	0.45	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 3/8"	Any Angle	4553N12	000000
								C	1	NPT	Female	4	0.6	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T213	000000
								C	1	NPT	Female	6	0.9	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T214	000000
								C	1	NPT	Female	8	1.2	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T215	000000
								C	1 1/4	NPT	Female	1	0.15	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	4"	Any Angle	6486T231	000000
								C	1 1/4	NPT	Female	4	0.6	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	4"	Any Angle	6486T232	000000
								C	1 1/4	NPT	Female	20	3	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	4"	Any Angle	6486T235	000000
								C	1 1/2	NPT	Female	1.5	0.225	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	4 1/2"	Any Angle	6486T241	000000


								C	1 1/2	NPT	Female	5	0.75	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	4 1/2"	Any Angle	6486T242	000000
								C	1 1/2	NPT	Female	30	4.5	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	4 1/2"	Any Angle	6486T245	000000
								C	2	NPT	Female	2	0.3	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	6486T251	000000
								C	2	NPT	Female	5	0.75	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	6486T252	000000
								C	2	NPT	Female	50	7.5	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	6486T255	000000


								316 Stainless Steel Body with 316 Stainless Steel Fittings







												SPDT

												C	1	NPT	Female	0.5	0.075	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T261	00000000


												C	1	NPT	Female	2	0.3	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T262	00000000
C												1	NPT	Female	4	0.6	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T263	00000000
C	1											NPT	Female	6	0.9	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T264	00000000
C	1											NPT	Female	8	1.2	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	3 1/4"	Any Angle	6486T265	00000000
C	2											NPT	Female	2	0.3	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	6486T291	00000000
C	2											NPT	Female	5	0.75	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	6486T292	00000000
C	2	NPT										Female	50	7.5	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	6486T295	00000000

90° Elbow


Style D	Style E

Polypropylene Fitting and PPS Fitting—Polypropylene and PPS fittings work with a wide range of chemicals. However, they can crack from impact or when overtightened.

SPDT—SPDT (single pole, double throw) switches can either turn one device from off to on (normally open) or from on to off (normally closed).

SPST—SPST (single pole, single throw) switches turn one device from off to on (normally open).

	Gender	Set Point, gpm	Approx. Difference Between Set Point and Reset Point, gpm	Max. Pressure @ Temp.	Temp. Range, ° F	Max. Switching Current @ Voltage	Mounting Position		Each
Polypropylene Body with Polypropylene Fittings







	SPST

	E	3/4	NPT	Female	0.25	0.05	100 psi @ 70° F	0 to 212	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	Any Angle	4553N13	0000000


	E	3/4	NPT	Female	0.5	0.1	100 psi @ 70° F	0 to 212	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	Any Angle	42015K6	000000
	E	3/4	NPT	Female	1	0.2	100 psi @ 70° F	0 to 212	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	Any Angle	4553N14	000000


	PPS Body with PPS Fittings







					SPDT

					D	1/4	NPT	Female	0.1	0.02	250 psi @ 70° F	0 to 225	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	Any Angle	42015K41	000000


					D	1/4	NPT	Female	0.25	0.05	250 psi @ 70° F	0 to 225	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	Any Angle	42015K42	000000
					D	1/4	NPT	Female	1	0.2	250 psi @ 70° F	0 to 225	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	Any Angle	42015K45	000000
					D	1/4	NPT	Female	1.5	0.3	250 psi @ 70° F	0 to 225	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	Any Angle	42015K46	000000