Flow Switches
raptor logo

Strictly Necessary Cookies

Always Active

These cookies make our website work. They include logging personal details, like login/sign-up or account data, browser information, images & videos, and shopping cart journey.

In addition, we use optimization cookies to test new features and designs on our website. The information collected helps us improve our website and customers' experience.

Advertising

These cookies are used to understand the performance and relevancy of our adverts, to provide you with personalised adverts on other websites and social media, to track when you have arrived at our site from a recognised third-party affiliate website, and to track if you made a purchase based on the adverts we displayed to you.

recommendations

These cookies enable us to provide personalised product and content recommendations, to make the browsing experience more relevant to you.

Functional

These cookies are used to offer customer surveys and feedback, to improve search results, and to allow you to share content from our website on social media.

analysis

These cookies help us improve our website by collecting and reporting information on how you use it.

GEMS SENSORS Flow Switches

Stainless-steel, brass, bronze, polypropylene and Ryton flow switches designed to control the flow of liquids, gases or steam. Feature a maximum fluid temperature of 300 degrees F, and can withstand a maximum pressure of 2000 psi

Filter


<p>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.</p>
GEMS SENSORS -

FS-150Series Flow Switch

StyleModelSwitch PositionMax. Flow RateMax. PressureHousing MaterialSwitch TypeConnection SizeConnection TypeMin. Flow RatePrice (ex. VAT)
AFS-150 NC 0.5GPMNormally Closed-150 psi, 200 psiPolypropyleneSPST1/2"NPT-€224.10
AFS-150 NC 1.0GPMNormally Closed1 GPM150 psi, 200 psiPolypropyleneSPST1/2"NPT-€207.50
AFS-150 NO 0.5GPMNormally Open0.5 GPM150 psi, 200 psiPolypropyleneSPST1/2"NPT1 GPM€224.10
AFS-150 NO 1.0GPMNormally Open1 GPM200 psiPolypropyleneSPST1/2"NPT-€216.18
AFS-150 NO 2.0GPMNormally Open2 GPM150 psi, 200 psiPolypropyleneSPST1/2"NPT-€212.71
AFS-150 NO 3.0GPMNormally Open3 GPM150 psi, 200 psiPolypropyleneSPST1/2"NPT-€224.10
GEMS SENSORS -

FS-380 Series Flow Switch

StyleModelSwitch TypeConnection TypeMin. Flow RateMax. Flow RateMin. Ambient Temp.Max. PressureMedia Temp. RangeMax. Ambient Temp.Price (ex. VAT)
AFS-380P 209876SPSTNPT0 GPM0.15 GPM0°F125 psi0°F to +212°F212°F€127.70
BFS-380 181130SPSTNPT0 GPM0.15 GPM-20°F1500 psi-20°F to +275°F275°F€273.95
CFS-380 179992SPSTNPT0 GPM0.25 GPM-20°F1500 psi-20°F to +275°F275°F€694.74
CFS-380 193482SPSTNPT0 GPM0.15 GPM-20°F1500 psi-20°F to +275°F275°F€670.70
BFS-380 168432SPSTNPT0 GPM0.25 GPM-20°F1500 psi-20°F to +275°F275°F€256.23
BFS-380 168433SPSTNPT0 GPM0.5 GPM-20°F1500 psi-20°F to +275°F275°F€252.56
AFS-380P 197083SPSTNPT0 GPM1 GPM0°F125 psi0°F to +212°F212°F€135.78
AFS-380P 197084SPSTNPT1 GPM1.5 GPM0°F125 psi0°F to +212°F212°F€127.70
AFS-380P 197085SPST, NONPT1 GPM2 GPM0°F125 psi0°F to +212°F212°F€135.78
AFS-380P 197081SPST, NONPT0 GPM0.25 GPM0°F125 psi0°F to +212°F212°F€127.70
BFS-380 168434SPST, NONPT0 GPM1 GPM-20°F1500 psi-20°F to +275°F275°F€259.44
BFS-380 168435SPST, NONPT1 GPM1.5 GPM-20°F1500 psi-20°F to +275°F275°F€273.95
BFS-380 178353SPST, NONPT1 GPM2 GPM-20°F1500 psi-20°F to +275°F275°F€273.95
AFS-380P 197082SPST, NONPT0 GPM0.5 GPM0°F125 psi0°F to +212°F212°F€127.70
CFS-380 179993SPST, NOMNPT---20°F1500 psi-20°F to +275°F275°F€597.99
CFS-380 179995SPST, NONPT1 GPM5 GPM-20°F1500 psi-20°F to +275°F275°F€633.57
CFS-380 179996SPST, NONPT1 GPM2 GPM-20°F1500 psi-20°F to +275°F275°F€664.00
GEMS SENSORS -

FS-4 Series Flow Switch

StyleModelSwitch TypeMin. Flow RateMax. Flow RateHousing MaterialConnection SizeConnection TypeMin. Ambient Temp.Max. PressurePrice (ex. VAT)
AFS-4 122352SPDT0 GPM0.1 GPMPolyphenylene Sulfide9/16"UNF0°F250 psi€239.79
AFS-4 122353SPDT1 GPM0.25 GPMPolyphenylene Sulfide9/16"UNF0°F250 psi€258.97
AFS-4 122355SPDT1 GPM0.75 GPMPolyphenylene Sulfide9/16"UNF0°F250 psi€220.28
AFS-4 122356SPDT0 GPM0.5 GPMPolyphenylene Sulfide9/16"UNF0°F250 psi€229.89
AFS-4 122354SPST0 GPM0.5 GPMPolyphenylene Sulfide9/16"UNF0°F250 psi€247.09
StyleModelMin. Flow RateMax. Flow RateSwitch TypeSwitch PositionConnection SizeConnection TypeMin. Ambient Temp.Max. PressurePrice (ex. VAT)
AFS-500 1702310 GPM0.25 GPMSPSTNormally Open3/4"FNPT0°F100 psi€811.80
AFS-500 1702320 GPM0.5 GPMSPSTNormally Open3/4"FNPT0°F100 psi€181.80
AFS-500 1702330 GPM1 GPMSPSTNormally Open3/4"FNPT0°F100 psi€178.53
AFS-500 1751171 GPM2 GPMSPSTNormally Open3/4"FNPT0°F100 psi€178.70
AFS-500 1702341 GPM2.5 GPMSPSTNormally Open3/4"FNPT0°F100 psi€181.80
AFS-500 1702351 GPM5 GPMSPSTNormally Open3/4"FNPT0°F100 psi€181.80
StyleModelMax. Flow RateMedia Temp. RangeSwitch TypeConnection SizeConnection TypeMin. Flow RateMin. Ambient Temp.Max. PressurePrice (ex. VAT)
AFS-926 269380.013 GPM-20°F to +225°FSPDT1/4"FNPT0 GPM-20°F1000 psi€597.66
AFS-926 269420.013 GPM-20°F to +225°FSPDT1/4"FNPT0 GPM-20°F1000 psi€567.21
AFS-926 269510.025 GPM-20°F to +300°FSPDT1/4"FNPT0 GPM-20°F1000 psi€971.34
AFS-926 269390.045 GPM-20°F to +225°FSPDT1/4"FNPT0 GPM-20°F1000 psi€567.21
AFS-926 269410.065 GPM-20°F to +225°FSPDT1/4"FNPT0 GPM-20°F1000 psi€597.66
AFS-926 269560.075 GPM-20°F to +300°FSPDT1/4"FNPT0 GPM-20°F1000 psi€926.84
AFS-926 269521 GPM-20°F to +225°FSPDT1/4"FNPT0 GPM-20°F1000 psi€971.34
StyleModelSwitch PositionMin. Flow RateMax. Flow RateHousing MaterialSwitch TypeConnection SizeConnection TypeMin. Ambient Temp.Price (ex. VAT)
AFS-927 70826Normally Closed0 GPM0.1 GPMBrassSPST1/4"FNPT-20°F€228.92
AFS-927 70827Normally Closed0 GPM0.25 GPMBrassSPST1/4"FNPT-20°F€227.73
AFS-927 70828Normally Closed0 GPM0.5 GPMBrassSPST1/4"FNPT-20°F€202.87
AFS-927 70829Normally Closed0 GPM0.75 GPMBrassSPST1/4"FNPT-20°F€227.73
AFS-927 70830Normally Closed0 GPM1 GPMBrassSPST1/4"FNPT-20°F€238.67
AFS-927 70831Normally Closed1 GPM1.5 GPMBrassSPST1/4"FNPT-20°F€193.58
AFS-927 70820Normally Open0 GPM0.1 GPMBrassSPST1/4"FNPT-20°F€238.67
AFS-927 70821Normally Open0 GPM0.25 GPMBrassSPST1/4"FNPT-20°F€240.07
AFS-927 70823Normally Open0 GPM0.75 GPMBrassSPST1/4"FNPT-20°F€219.36
AFS-927 70822Normally Open0 GPM0.5 GPMBrassSPST1/4"FNPT-20°F€251.51
AFS-927 70825Normally Open1 GPM1.5 GPMBrassSPST1/4"FNPT-20°F€240.07
StyleModelHousing MaterialSwitch TypeConnection SizeConnection TypeMin. Flow RateMax. Flow RateMin. Ambient Temp.Max. PressurePrice (ex. VAT)
AFS-10798 25365BrassSPDT1/2"FNPT0.5 GPM20 GPM-20°F1000 psi€987.93
AFS-10798 25366Epoxy, Stainless Steel, VitonSPDT1/2"FNPT0.5 GPM20 GPM-20°F1000 psi€1,587.91
GEMS SENSORS -

Flow Switch 20 Cm/sec

StyleModelConnection SizeMin. Flow RateMax. Flow RateMin. Ambient Temp.Housing MaterialSwitch TypeSwitch PositionConnection TypePrice (ex. VAT)
A230500-4-201 1/2"1 GPM3.86 GPM-14°Stainless SteelSPSTNormally OpenFNPT€814.09
A230500-3-201"1 GPM1.65 GPM-14°Stainless SteelSPSTNormally OpenFNPT€814.09
A230500-1-201/2"0 GPM0.46 GPM-14°Stainless SteelSPSTNormally OpenFNPT€790.87
A230500-2-203/4"1 GPM1.01 GPM-14°FStainless SteelSPSTNormally OpenFNPT€814.09
GEMS SENSORS -

Flow Switch 40 Cm/sec

StyleModelConnection SizeMin. Flow RateMax. Flow RateMin. Ambient Temp.Housing MaterialSwitch TypeSwitch PositionConnection TypePrice (ex. VAT)
A230500-4-51 1/2"1 GPM5 GPM-14°Stainless SteelSPSTNormally OpenFNPT€853.16
A230500-3-51"0 GPM0.64 GPM-14°FStainless SteelSPSTNormally OpenFNPT€853.16
A230500-3-401"1 GPM3 GPM-14°Stainless SteelSPSTNormally OpenFNPT€814.09
A230500-2-53/4"0 GPM0.35 GPM-14°Stainless SteelSPSTNormally OpenFNPT€814.09
A230500-2-403/4"1 GPM1.9 GPM-14°Stainless SteelSPSTNormally OpenFNPT€775.65
GEMS SENSORS -

Flow Switch 60 Cm/sec

StyleModelConnection SizeMax. Flow RateMin. Ambient Temp.Housing MaterialSwitch TypeSwitch PositionConnection TypeMin. Flow RatePrice (ex. VAT)
A230500-3-601"4.34 GPM-14°FStainless SteelSPSTNormally OpenFNPT1 GPM€814.09
A230500-1-601/2"1.34 GPM-14°Stainless SteelSPSTNormally OpenFNPT1 GPM€814.09
A230500-2-603/4"2.79 GPM-14°Stainless SteelSPSTNormally OpenFNPT1 GPM€853.16
GEMS SENSORS -

Liquid Flow Switch

StyleModelConnection SizeConnection TypeMin. Flow RateMax. Flow RateMin. Ambient Temp.Max. PressureMedia Temp. RangeMax. Ambient Temp.Price (ex. VAT)
AFS-550 296091"NPT15 GPM52 GPM-30°F2000 psi-30°F to +300°F300°F€530.43
BFS-550 296081"NPT15 GPM52 GPM-30°F2000 psi-30°F to +300°F300°F€811.80
CFS-200 266151"FNPT1 GPM6 GPM-20°F400 psi-20°F to +200°F200°F€508.14
CFS-200 266161"FNPT5 GPM15 GPM-20°F400 psi-20°F to +200°F200°F€535.37
CFS-200 268381"FNPT2 GPM8 GPM-20°F400 psi-20°F to +200°F200°F€508.14
DRFS 1816881"FNPT8 GPM60 GPM-20°F200 psi-20°F to +212°F150°F€683.80
EFS-10798 253641/2"FNPT0.5 GPM20 GPM-20°F1000 psi-20°F to +300°F300°F€1,593.37
DRFS 1554851/2"FNPT4 GPM20 GPM-20°F100 psi-20°F to +180°F150°F€499.90
DRFS 1562681/2"FNPT4 GPM20 GPM-20°F200 psi-20°F to +212°F150°F€658.11
DRFS 1554251/4"FNPT0.5 GPM5 GPM-20°F100 psi-20°F to +180°F150°F€498.61
DRFS 1562651/4"FNPT0.5 GPM5 GPM-20°F200 psi-20°F to +212°F150°F€676.27
FFS-400 266003/4"FNPT0.75 GPM4 GPM-20°F400 psi-20°F to +180°F180°F€502.79
FFS-400 266013/4"FNPT2 GPM8 GPM-20°F400 psi-20°F to +180°F180°F€520.34
FFS-400 266023/4"FNPT7 GPM14 GPM-20°F400 psi-20°F to +180°F180°F€493.88
DRFS 1803953/4"FNPT5 GPM30 GPM-20°F200 psi-20°F to +212°F150°F€639.47

Features

  • Gems Sensors SPDT 20VA air flow switches feature brass / stainless steel construction for structural rigidity and resisting corrosion on exposed surfaces. These Gems flow switches can be operated at fluid temperatures ranging from -20 to 300 degrees F. They have an SPDT switch for three-way switching and have operating pressures up to 1000 psi.
  • The brand's flow switches feature 303 / 316 stainless steel construction for structural rigidity and resisting corrosion on exposed surfaces. These Gems flow switches can be operated at temperatures up to -14 to 140 degrees F. They are compatible with liquid or gases and have a flow rate of 5 / 40 cm/sec.

Frequently Asked Questions

How does the flow switch work?

Flow switch works by detecting the movement of a sensing element in response to the fluid flow. When the fluid flow reaches a certain threshold, the sensing element is actuated and triggers an electrical switch for controlling other devices, such as pumps or valves.

What factors should be considered while selecting Gems Sensors flow switch?

  • Flow rate
  • Pressure and temperature of the fluid being detected
  • Material compatibility of the sensing element and housing with the fluid.

We are here to help!

Looking for a part not listed here?