Series V10 Flotect® Mini-Size Flow Switch

Proof of Flow or No Flow in 1/2" to 2" Pipe, Cost Effective, Leak Proof Body, Weatherproof

The Series V10 Flotect® Mini-Size Flow Switches is designed to provide inexpensive, reliable monitoring of the presence or absence of flow in a system. This series is available for field installation in pipelines from 1/2 to 2" diameter and available in brass or 303 SS body.

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Product Applications

  • Proving flow in boilers, hot water heaters, and chillers
  • Protects pumps, motors and other equipment against low or no flow
  • Automatically starts auxiliary pumps and engines

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Build Your Custom Part. Use our Product Configurator

Model Description Usually Ships* Price Order
Ships: Same Day
Price: $79.50
Mini-size flow switch, brass, normally open or closed. Same Day* $79.50 Order
Ships: Same Day
Price: $122.00
Mini-size flow switch, 303 SS, normally open or closed. Same Day* $122.00 Order

Can't find what you need? Build Your Custom Part. Use our Product Configurator


Compatible gases or liquids.
Wetted Material:
Vane: 301 SS; Body: Brass or 303 SS; Pin and Magnet: Ceramic 8.
Temperature Limit:
200°F (93°C).
Pressure Limit:
Brass body: 1000 psig (69 bar), 303 SS body: 2000 psig (138 bar).
Enclosure Rating:
Weatherproof, meets NEMA 4X (IP66).
Switch Type:
SPST hermetically sealed reed switch. Field adjustable for normally open or normally closed.
Electrical Rating:
0.5 A @ 120 VAC; 1.5 A @ 24 VDC res.; 0.001 A @ 200 VDC res.
Electrical Connections:
18 AWG, 19" (483 mm) long, PVC jacket. Rated 221°F (105°C).
Process Connection:
1/2" male NPT standard. Contact factory for other options.
Mounting Orientation:
Switch can be installed in any position but the actuation/deactuation flow rates are based on horizontal pipe runs and are nominal values.
Set Point Adjustment:
Vane is trimmable.
5.5 oz (0.16 kg).
Agency Approvals:
Switch Enclosure:


  • Superior performance with rugged magnetically-actuated switching design and hermetically sealed reed switch
  • Application flexibility with simple field switch adjustment allowing to toggle between normally open (NO) or normally closed (NC) with no change in the electrical connection
  • Save time and money on maintenance with electrical assembly that can be easily replaced without removing the unit from installation so that the process does not have to be shut down
  • Solves application needs with full size, field-trimmable stainless steel vane provided with removable template calibrated for brass or ductile iron reducing tees with forged steel straight tee/bushing combinations

Model Chart

EXAMPLE V10 ST Series V10SS-ST Flotect® Mini-Size Flow Switch, stainless steel housing, with stainless steel tag.
  Flotect® Mini-Size Flow Switch with Brass Housing
Flotect® Mini-Size Flow Switch with 303SS Housing
Stainless Steel Tag
BSPT Process Connection

Product Literature


Catalog Pages




Can the V10 flow switch be mounted for use in a vertical up-flow application?
Yes. The standard V10 has a spring return on the vane which allows for mounting in any position.
What does actuation and de-actuation mean?
Actuation means that the flow rate has reached a point where the microswitch trips or the contacts of the microswitch change state. De-actuation means that the flow rate has decreased to a point where the microswitch returns to its normal state.
What material is used as a seal between the process fluid and the electrical portion of the switch?
The body material; as there is no separate "seal" since the body is machined from solid stock and the switch is magnetically actuated.

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