Flow Switches

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Flow switches detect fluid flow in hydraulic systems and prevent leaks. They are used in pumps in the water treatment, oil & gas and chemical industries.

PROSENSE -

Style	Model	Price (inc. VAT)
A	FSD1-AP-26H	£329.59
B	FSD75-AP-6H	£273.45

Style	Model	Tee Connection Size	Body Material	Conduit Connection Type	Tee Material	Temp. Range	Wetted Materials	Connection Size	Grade	Price (inc. VAT)
A	V8-WP	-	-	MNPT	-	-	Polyphenylene Sulfide, Stainless Steel, Ceramic	1"	-	£242.54	RFQ
B	V4-SS-2-D-U	-	Stainless Steel	-	-	-4° to 275° F	-	1 1/2"	Grade 316	£1,306.38	RFQ
C	V10SS	-	Stainless Steel	-	-	-	-	1/2"	-	£207.90	RFQ
B	V4-2-U	-	Brass	-	-	-4° to 275° F	-	1 1/2"	-	£820.36	RFQ
B	V4-2-D-U	-	Brass	-	-	-4° to 275° F	-	1 1/2"	-	£937.91	RFQ
D	V8	-	-	MNPT	-	-	Polyphenylene Sulfide, Stainless Steel, Ceramic	1"	-	£177.59	RFQ
B	V4-SS-2-U	-	Stainless Steel	-	-	-4° to 275° F	-	1 1/2"	Grade 316	£1,194.71	RFQ
E	V7-WBS-30N	-	Brass, Die Cast Aluminum	NPSM	-	-40° to 250° F	Stainless Steel, Brass, Ceramic	1"	Grade 301, 302	£194.94	RFQ
F	V6EPS-S-D-5-S	1 1/2"	Stainless Steel	-	Stainless Steel	-	-	-	-	£1,289.62	RFQ
F	V6EPB-B-D-5-MI	1 1/2"	Brass	-	Iron	-	-	-	-	£749.49	RFQ
F	V6EPS-S-S-5-S	1 1/2"	Stainless Steel	-	Stainless Steel	-	-	-	-	£1,151.72	RFQ
F	V6EPB-B-D-5-B	1 1/2"	Brass	-	Brass	-	-	-	-	£723.36	RFQ
F	V6EPB-B-S-5-B	1 1/2"	Brass	-	Brass	-	-	-	-	£630.42	RFQ
F	V6EPB-B-S-5-MI	1 1/2"	Brass	-	Iron	-	-	-	-	£653.19	RFQ
F	V6EPS-S-S-4-S	1 1/4"	Stainless Steel	-	Stainless Steel	-	-	-	-	£960.08	RFQ
F	V6EPS-S-D-4-S	1 1/4"	Stainless Steel	-	Stainless Steel	-	-	-	-	£1,147.26	RFQ
F	V6EPB-B-S-4-B	1 1/4"	Brass	-	Brass	-	-	-	-	£546.04	RFQ
F	V6EPB-B-D-4-MI	1 1/4"	Brass	-	Iron	-	-	-	-	£653.19	RFQ
F	V6EPB-B-S-4-MI	1 1/4"	Brass	-	Iron	-	-	-	-	£556.88	RFQ
F	V6EPB-B-D-4-B	1 1/4"	Brass	-	Brass	-	-	-	-	£640.48	RFQ
F	V6EPB-B-S-3-B	1"	Brass	-	Brass	-	-	-	-	£484.47	RFQ
F	V6EPB-B-S-3-MI	1"	Brass	-	Iron	-	-	-	-	£530.58	RFQ
F	V6EPS-S-D-3-S	1"	Stainless Steel	-	Stainless Steel	-	-	-	-	£887.66	RFQ
F	V6EPB-B-D-3-B	1"	Brass	-	Brass	-	-	-	-	£565.77	RFQ
F	V6EPB-B-D-3-MI	1"	Brass	-	Iron	-	-	-	-	£586.20	RFQ

Series FS6 Switch Liquid Flow
McDonnell & Miller FS6 liquid flow switches are designed to monitor the flow of liquids, such as water or oil, in pipes and systems. These liquid flow switches are highly sensitive and used in cooling systems, booster pumps, water treatment systems and compressors. They have a sealed compartment that protects the switch from liquids and a sensitivity adjustment screw to prevent false tripping of the flow switch. These liquid flow switches serve as a crucial safeguard, preventing damage and potential hazards caused by insufficient or excess liquid flow. They can be operated at temperatures ranging from 32 to 225 degrees F and can withstand pressures up to 100 psi. These liquid flow switches are integrated with an SPDT switch for monitoring the direction of liquid flow.

Style	Model	Connection Size	Type	Wetted Materials	Price (inc. VAT)
A	FS6-W-1	1 FNPT	High Sensitivity Switch	Brass, S/S, Buna N, Viton, PTFE	£1,084.69
B	FS6-1	1 FNPT	7.4 Amps, High Sensitivity Switch	Brass, S/S, Buna N, Viton, PTFE	£947.25
C	FS6	1" / 3/4" NPT	1/3 HP, General Purpose, Electrically Operated	Brass, EPDM	-	RFQ
B	FS6-W-3/4	3/4 FNPT	High Sensitivity Switch	Brass, S/S, Buna N, Viton, PTFE	£1,081.72
B	FS6-3/4	3/4 FNPT	Heavy-duty, High Sensitivity Switch	Brass, S/S, Buna N, Viton, PTFE	£957.77

GEMS SENSORS -

Air Flow Switch Piston Spdt 20va

Style	Model	Body Material	Material	Price (inc. VAT)
A	FS-10798 25365	Brass	Brass, SS, Viton, Epoxy	£924.61
A	FS-10798 25366	Stainless Steel	SS, Viton, Epoxy	£1,444.86

MCDONNELL & MILLER -

Series FS25 General Purpose Flow Switch

Style	Model	Price (inc. VAT)
A	FS251	£364.72
B	FS254	£533.82

MCDONNELL & MILLER -

Style	Model	Max. Ambient Temp.	Price (inc. VAT)
A	AF3	275 F	£451.42	RFQ
A	AFE-1	275 F	£2,298.21	RFQ
A	AF2	300 F	-	RFQ

Style	Model	Flow Rate	Switch Type	Price (inc. VAT)
A	FS-150 NO 0.5GPM	0.5 gpm	SPST, Normally Open @ No Flow	£215.51
A	FS-150 NC 0.5GPM	0.5 gpm	SPST, Normally Closed @ No Flow	£212.52
A	FS-150 NC 1.0GPM	1 gpm	SPST, Normally Closed @ No Flow	£204.93
A	FS-150 NO 1.0GPM	1 gpm	SPST, Normally Open @ No Flow	£221.32
A	FS-150 NO 2.0GPM	2 gpm	SPST, Normally Open @ No Flow	£206.10
A	FS-150 NO 3.0GPM	3 gpm	SPST, Normally Open @ No Flow	£218.88

Style	Model	Flow Rate	Price (inc. VAT)
A	FS-4 122352	0.1 gpm	£221.90
A	FS-4 122354	0.5 gpm	£233.11
A	FS-4 122353	0.25 gpm	£230.49
A	FS-4 122355	0.75 gpm	£216.59
A	FS-4 122356	1 gpm	£238.67
A	FS-4 122357	1.5 gpm	£158.38

Style	Model	Body Material	Flow Rate	Material	Max. Fluid Temp.	Price (inc. VAT)
A	FS-926 26938	Brass	50 cc/min	Brass, Polysulfone, SS, Viton, Epoxy	225 F	£556.50
A	FS-926 26939	Brass	100 cc/min	Brass, Polysulfone, SS, Viton, Epoxy	225 F	£532.76
A	FS-926 26941	Brass	150 cc/min	Brass, Polysulfone, SS, Viton, Epoxy	225 F	£579.58
A	FS-926 26942	Brass	200 cc/min	Brass, Polysulfone, SS, Viton, Epoxy	225 F	£549.24
A	FS-926 26943	Brass	250 cc/min	Brass, Polysulfone, SS, Viton, Epoxy	225 F	£420.57
A	FS-926 26944	Brass	300 cc/min	Brass, Polysulfone, SS, Viton, Epoxy	225 F	£420.57
A	FS-926 26951	Stainless Steel	50 cc/min	SS, Viton, Epoxy	300 F	£907.72
A	FS-926 26952	Stainless Steel	100 cc/min	SS, Viton, Epoxy	300 F	£904.92
A	FS-926 26953	Stainless Steel	150 cc/min	SS, Viton, Epoxy	300 F	£673.53
A	FS-926 26954	Stainless Steel	200 cc/min	SS, Viton, Epoxy	300 F	£673.53
A	FS-926 26955	Stainless Steel	250 cc/min	SS, Viton, Epoxy	300 F	£673.53
A	FS-926 26956	Stainless Steel	300 cc/min	SS, Viton, Epoxy	300 F	£877.85

Style	Model	Connection Size	Price (inc. VAT)
A	20X872	1 FNPT	£802.38
A	20X876	1-1/2 FNPT	£778.35
A	20X864	1/2 FNPT	£817.02
A	20X868	3/4 FNPT	£778.35

Style	Model	Contact Rating	Max. Ambient Temp.	Max. HP	Switch Type	Price (inc. VAT)
A	IFSWSBF-1	10A at 125/250	151 Degrees	1/3	SPDT	£336.20
B	IFSWSBR-1	10A at 125/250 VAC	151 Degrees	1/3	SPDT	£382.04
C	IFSW2BF-1	15A at 125/250 VAC	176 Degrees	1/8 to 1/4	(2) SPDT	£516.43
D	IFS01BR-1	15A at 125/250 VAC	176 Degrees	1/8 to 1/4	SPDT	£371.12
E	IFSW2BR-1	15A at 125/250 VAC	176 Degrees	1/8 to 1/4	(2) SPDT	£392.64
F	IFS01BF-1	15A at 125/250 VAC	176 Degrees	1/8 to 1/4	SPDT	£267.84
G	IFS02BF-1	15A at 125/250 VAC	176 Degrees	1/8 to 1/4	(2) SPDT	£453.39
H	IFSH1BR-1	22A at 125/250 VAC	176 Degrees	1/2 to 1	SPDT	£338.35
I	IFSH2BF-1	22A at 125/250 VAC	176 Degrees	1/2 to 1	(2) SPDT	£369.77
J	IFSH1BF-1	22A at 125/250 VAC	176 Degrees	1/2 to 1	SPDT	£313.59

Style	Model	Price (inc. VAT)
A	FS4-3DS	£1,485.41	RFQ
B	FS7-4D	£1,221.89	RFQ
C	FS8-WJ	£477.96	RFQ
D	FS4-3D	£639.27	RFQ
E	FS7-4SE	£2,211.34	RFQ
F	FS4-3T1-3/4	£726.28	RFQ
G	FS4-3T3-1	£789.95	RFQ
H	FS4-3RP-T	£531.57	RFQ
I	FS5-D-3/4	£860.64	RFQ
A	FS4-3S	£1,035.23	RFQ
J	FS4-3T3-3/4	£670.46	RFQ

Style	Model	Type	Connection Size	Contact Rating	Voltage	Flow Rate	Max. Ambient Temp.	Max. Fluid Temp.	Max. HP	Price (inc. VAT)
A	F261KEH-V01C	Low Flow	1/2 FNPT x 1/2 FNPT	16A @ 120 VAC - Full Load	24V-230V	0.6 gpm to 17 gpm	140	250	1	£355.01
B	F261KFH-V01C	Low Flow	3/4 FNPT x 3/4 FNPT	16A @ 120 VAC - Full Load	24V-230V	0.6 gpm to 17 gpm	140	250	1	£353.06
A	F261MFH-V01C	Low Flow	3/4 FNPT x 3/4 FNPT	16A @ 120 VAC - Full Load	24V-230V	0.6 gpm to 17 gpm	140	250	1	£545.55
A	F261KFH-V02C	Low Flow	3/4 FNPT x 3/4 FNPT	16A @ 120 VAC - Full Load	24V-230V	0.6 gpm to 17 gpm	140	250	1	£365.23
A	F261MEH-V01C	Low Flow	1/2 FNPT x 1/2 FNPT	16A @ 120 VAC - Full Load	24V-230V	0.6 gpm to 17 gpm	140	250	1	£493.44
A	F261KAH-V01C	Standard Flow	1 MNPT	16A @ 120 VAC - Full Load	24V-230V	2.5 gpm to 760 gpm	140 Degrees	250 Degrees	1	£331.64
A	F261MAL-V01C	Standard Flow	1"	10A @ 120V AC/360VA @ 120V AC Pilot Duty	4-120V	2.5 gpm to 760 gpm	140° F	250° F	1 hp	£499.43
C	F261MAH-V01C	Standard Flow	1 MNPT	16A @ 120 VAC - Full Load	24V-230V	2.5 gpm to 760 gpm	140	250	1	£421.78

Style	Model	Connection Size	Item	Max. Fluid Temp.	Type	Price (inc. VAT)
A	FS5-1	1 FNPT	Flow Switch	250 F	1/3 HP, General Purpose, Electrically Operated	£628.95
B	FS5	1" NPT	-	225 F	1/3 HP, General Purpose, Electrically Operated	-	RFQ
A	FS5-3/4	3/4 FNPT	Liquid Flow Switch	250 F	General Purpose Switch	£582.36

Style	Model	Item	Max. Pressure	Type	Wetted Materials	Price (inc. VAT)
A	FS7-4S	Dual Head Drench Hose	1000 psi	Industrial/Heavy-duty	S/S, PTFE	£1,668.79
B	FS7-4SW	Flow Switch	1000 psi	Industrial/Heavy-duty Switch	S/S, PTFE	£2,008.71
C	FS7-4W	Flow Switch	300 psi	Industrial/Heavy-duty Switch	Brass, S/S, Bronze, PTFE	£1,212.46
D	FS7-4E	Flow Switch	300 psi	Industrial/Heavy-duty Switch	Brass, S/S, Bronze, PTFE	£1,464.80

Style	Model	Body Material	Contact Rating	Flow Rate	Material	Max. Ambient Temp.	Max. Fluid Temp.	Max. Pressure	Price (inc. VAT)
A	FS-380 178353	Brass	20VA	2 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£283.79
A	FS-380 181130	Brass	20VA	0.15 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£258.29
A	FS-380 168435	Brass	20VA	1.5 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£269.13
A	FS-380 168434	Brass	20VA	1 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£266.38
A	FS-380 168433	Brass	20VA	0.5 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£256.10
A	FS-380 168432	Brass	20VA	0.25 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£272.75
B	FS-380P 197081	Polypropylene	10VA	0.25 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£123.58
B	FS-380P 197082	Polypropylene	10VA	0.5 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£120.88
B	FS-380P 197085	Polypropylene	10VA	2 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£128.10
B	FS-380P 197083	Polypropylene	10VA	1 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£128.27
B	FS-380P 209876	Polypropylene	10VA	0.15 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£121.42
B	FS-380P 197084	Polypropylene	10VA	1.5 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£123.58
C	FS-380 179995	Stainless Steel	20VA	1.5 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£659.99
C	FS-380 179994	Stainless Steel	20VA	1 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£492.00
C	FS-380 193482	Stainless Steel	20VA	0.15 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£624.78
C	FS-380 179992	Stainless Steel	20VA	0.25 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£624.78
C	FS-380 179993	Stainless Steel	20VA	0.5 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£497.10
C	FS-380 179996	Stainless Steel	20VA	2 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£616.79

Style	Model	Flow Rate	Price (inc. VAT)
A	FS-500 170232	0.5 gpm	£169.94
A	FS-500 170231	0.25 gpm	£834.08
A	FS-500 170233	1 gpm	£176.73
A	FS-500 175117	2 gpm	£178.16
A	FS-500 170234	2.5 gpm	£175.08
A	FS-500 170235	5 gpm	£168.73

Style	Model	Flow Rate	Switch Type	Price (inc. VAT)
A	FS-927 70826	0.1 gpm	SPST, NC	£234.43
A	FS-927 70820	0.1 gpm	SPST, NO	£228.20
A	FS-927 70822	0.5 gpm	SPST, NO	£239.67
A	FS-927 70828	0.5 gpm	SPST, NC	£234.43
A	FS-927 70821	0.25 gpm	SPST, NO	£237.77
A	FS-927 70827	0.25 gpm	SPST, NC	£236.66
A	FS-927 70823	0.75 gpm	SPST, NO	£236.53
A	FS-927 70829	0.75 gpm	SPST, NC	£237.82
A	FS-927 70824	1 gpm	SPST, NO	£237.34
A	FS-927 70830	1 gpm	SPST, NC	£235.69
A	FS-927 70825	1.5 gpm	SPST, NO	£247.03
A	FS-927 70831	1.5 gpm	SPST, NC	£237.61

Style	Model	Connection Size	Flow Rate	Price (inc. VAT)
A	20X873	1 FNPT	40 cm/sec	£778.35
A	20X871	1 FNPT	5 cm/sec	£778.35
A	20X875	1-1/2 FNPT	5 cm/sec	£802.38
A	20X877	1-1/2 FNPT	40 cm/sec	£778.35
A	20X863	1/2 FNPT	5 cm/sec	£631.21
A	20X865	1/2 FNPT	40 cm/sec	£778.35
A	20X867	3/4 FNPT	5 cm/sec	£802.38
A	20X869	3/4 FNPT	40 cm/sec	£725.54

Style	Model	Connection Size	Price (inc. VAT)
A	20X874	1 FNPT	£778.35
A	20X878	1-1/2 FNPT	£623.61
A	20X866	1/2 FNPT	£778.35
A	20X870	3/4 FNPT	£802.38

Style	Model	Max. Pressure	Body Material	Connection Size	Type	Voltage	Contact Rating	Flow Rate	Material	Price (inc. VAT)
A	RFS 155425	100 psi	Polypropylene	1/4 FNPT	Rotor	24 VDC	35mA/95mA	0.1 to 5 gpm	Polypropylene, Ceramic, PPS Composite, Polysulfone, Buna N	£497.05
A	RFS 155485	100 psi	Polypropylene	1/2 FNPT	Rotor	24 VDC	35mA/95mA	1.5 to 20 gpm	Polypropylene, Ceramic, PPS Composite, Polysulfone, Buna N	£510.57
A	RFS 156265	200 psi	Brass	1/4 FNPT	Rotor	24 VDC	35mA/95mA	0.1 to 5 gpm	Brass, Ceramic, PPS Composite, Polysulfone, Viton	£619.00
A	RFS 156268	200 psi	Brass	1/2 FNPT	Rotor	24 VDC	35mA/95mA	1.5 to 20 gpm	Brass, Ceramic, PPS Composite, Polysulfone, Viton	£626.43
A	RFS 180395	200 psi	Brass	3/4 FNPT	Rotor	24 VDC	35mA/95mA	5 to 30 gpm	Brass, Ceramic, PPS Composite, Polysulfone, Viton	£631.45
A	RFS 181688	200 psi	Brass	1 FNPT	Rotor	24 VDC	35mA/95mA	8 to 60 gpm	Brass, Ceramic, PPS Composite, Polysulfone, Viton	£706.08
B	FS-200 26838	400 psi	Bronze	1 FNPT	Shuttle	-	20VA	2 to 8 gpm	Bronze, PTFE, SS, Viton, Ceramic	£480.45
C	FS-400 26600	400 psi	Bronze	3/4 FNPT	Shuttle	-	20VA	0.75 to 4 gpm	Bronze, Delrin, SS, Viton, Ceramic	£467.41
C	FS-400 26601	400 psi	Bronze	3/4 FNPT	Shuttle	-	20VA	2 to 8 gpm	Bronze, Delrin, SS, Viton, Ceramic	£514.84
C	FS-400 26602	400 psi	Bronze	3/4 FNPT	Shuttle	-	20VA	7 to 14 gpm	Bronze, Delrin, SS, Viton, Ceramic	£504.47
B	FS-200 26615	400 psi	Bronze	1 FNPT	Shuttle	-	20VA	1 to 6 gpm	Bronze, PTFE, SS, Viton, Ceramic	£495.68
B	FS-200 26616	400 psi	Bronze	1 FNPT	Shuttle	-	20VA	5 to 15 gpm	Bronze, PTFE, SS, Viton, Ceramic	£524.08
D	FS-10798 25364	1000 psi	Stainless Steel	1/2 FNPT	Piston	-	20VA	0.5 to 20 gpm	SS, Viton, Epoxy	£1,662.76
E	FS-550 29609	2000 psi	Brass	1 MNPT	Paddle	24V-240V AC/DC	20VA	15 to 48 gpm	Brass, SS, Ceramic, PTFE	£490.26
F	FS-550 29608	2000 psi	Stainless Steel	1 MNPT	Paddle	-	20VA	15 to 48 gpm	SS, Ceramic, PTFE	£731.71

Flow Switches

Flow switches are primarily designed to monitor the air, steam or liquid flow and send signals to the pump for automatic ON / OFF switching with the rise and fall of water level; ideal for regulating water cooling equipment and water treatment or hydronic heating systems. Raptor Supplies offers a wide range of these liquid flow switches from brands like Bradley, Dwyer Instruments, Mcdonnell & Miller, Dayton, Johnson Controls, Gems Sensors and Taco. Gems Sensors flow switches uses 100-micron filtration technology and are less susceptible to clogging than other high-pressure inline flow switches. These units come equipped with one-piece magnetic composite piston which actuates the sealed reed switch when displaced by the pressure difference in fluid flow, thereby activating remote alarms or indicators. They are available in brass, polypropylene and stainless steel construction with a maximum pressure rating and flow rate of 1500 psi and 2 GPM, respectively. Taco industrial flow switches feature flow sensitivity adjustment mechanism for setting a wide adjustment range to start or stop an electronically operated device when flow / no-flow condition occurs. These low-flow switches come with a highly malleable EPDM seal providing anti-hardening, cracking and leakage properties and improving the performance in high-pressure applications such as chillers, boilers, heating systems and water systems. They are available in NEMA 1 and NEMA 4 rated enclosures providing protection against the ingress of foreign contaminants and are ideal for use with 1 - 8 inch (outer diameter) pipe sizes.

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FS-150Series Flow Switch

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Liquid Flow Switch

Flow Switches

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