Paddle flow switches, reed switch contact, built-in 16A SPDT relay

General application in flow detection. Recommended mounting position is on horizontal pipes, but can be mounted in any position. For water flow detection on dia 15 to 100mm water pipes. The built-in relay with SPDT contact can be used on resistive loads up to 15A 250V. The pilot light shows the contact position.

 

Flow sensing

Main housing material

Paddle material

Mounting position

Mounting type

Voltage

Electrical rating

Ingress protection

Electrical connection type

Maximum flow detection (L/min)

Minimum flow detection (L/min)

Calibration (gr)

, ,

Nominal pressure at 20°C

Max operating temperature (°C)

Liquids temperature range (°C)

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Description

1: Cleavable paddle 2: Plastic body and plastic ¾” BSPP union nut 3: Connection box 4: Adjustment screw 5: Pilot light

Size and pressure Flow sensing:

cleavable paddle

Mounting:

¾” BSPP Union nut

Contact:

Reed switch, close on
flow rise

Electrical rating Mounting position Type
PN10

RAX

DN≥15

Main uses

General application in flow detection. Recommended mounting position is on horizontal pipes, but can be mounted in any position. For water flow detection on dia 15 to 100mm water pipes. The built-in relay with SPDT contact can be used on resistive loads up to 15A 250V. The pilot light shows the contact position.

Functional principle

Balanced magnetic paddle mounted perpendicular to the flow and activating a reed switch through the wall. The return of the paddle is by made by magnetic action, without spring. No seal or liquid can pass between the piping system and the electrical contact. Suitable for corrosive water pools and spas and salination chlorination and bromination systems. Must not be used for water containing magnetic particles or high viscosity liquids, which block the movement of the paddle.

Adjustment:

  • By cleaving the paddle
  • Fine adjustment by screw driver on internal dial (on models with connection box only)

Paddle shaft: Titanium, providing an outstanding corrosion resistance, and improved mechanical live. Suitable for corrosive water pools and spas and salination, chlorination and bromination systems.

Main housing material: PPO, fiber glass reinforced for improved pressure resistance, usable with potable water.

Paddle: PPO, 12 mm width, can be cleaved into 4 sections numbered 1 to 4 for pipe diameter adjustment.

Pipe mounting: Fiber glass reinforced union nut, ¾ BSPP, mounting on ¾ BSPP male fitting with gasket. Recommended torque: 7±1Nm.

Gasket: NBR

Electrical rating: 15A, 250V, resistive load. Use on inductive circuits reduces electrical rating.

Electric contact type: SPDT

Liquid compatibility: For use with clean water and liquids without magnetic particles and without chemical incompatibility with PPO and titanium.

Nominal pressure at 20°C: 1MPa (PN10) Liquid temperature ranges: 5 to 100°C (cannot be used in water freezing pipes).

Ambient temperature range: 5 to 80°C

Ingress protection: IP65

Calibration tolerances: +/-15% (on paddle operating force at end of paddle 1).

Electrical connection: 2.5mm² connection block with screw terminals M16 cable gland output.

Installation instructions:

  • Check carefully the paddle orientation: The arrow on housing must be exactly parallel to the
  • A 5 mm minimum gap must be respected between end of the paddle and tube wall opposite to the
  • We recommend the use of nozzles of length below or equal to 18mm between the gasket seat and the inside of the tube and with an inner diameter above or equal to 5 mm, to avoid blocking of the paddle.

Accessories: 3/4″ male PVC saddles for DN40 to DN100 (OD) PVC pipes, and other fittings: see last section of this catalogue.

Options (MOQ apply): nickel plated ¾” BSPP union nut.

Important notice: In the case of plastic pipes (PVC, PE), the DN (nominal diameter) corresponds to the outside diameter and wall thickness is variable depending on the application. This must be taken into account to avoid blocking the paddle. In the case of metal pipes, the inner diameter corresponds to the DN. Flow values data are for tubes whose internal diameter corresponds to DN.

Pipe mounting configurations

Average Flow detection values (Liters/min)

 

Paddle

length

Pipe ID (mm)
15 20 25 32 40 50 63 100
*Close **Open *Close **Open *Close **Open *Close **Open *Close **Open *Close **Open *Close **Open *Close **Open
1-m 2,7 2,3 4,8 4,5 13 11 22 20 38 35 67 47 167 112 472 317
1-H 4,3 3,3 7,3 6,5 18 17 29 27 53 48 83 72 218 142 616 401
1-M 5,5 3,2 14 12 25 22 38 35 67 60 132 108 262 202 740 571
1+2-m 20 18 37 32 68 52 192 155
1+2-H 30 28 53 43 88 72 248 203
1+2-M 40 37 67 63 123 115 347 324
1~3-m 22 20 37 33 125 108
1~3-H 34 32 63 50 176 165
1~3-M 46 43 77 73 233 217
1~4-m 27 24 88 72
1~4-H 43 40 140 132
1~4-M 58 55 180 167
m= calibration at min span

H= calibration at Half span

M= calibration at Max span

* Close by flow rise (L/min) of contact open at no flow position

** Open by flow decrease (L/min) of contact open at no flow position. Average values for indication only. Standard tolerances ±15%

 

Main references  (With type A cleavable paddle)

Other paddles (Non cleavable models)

Paddle type B Paddle type C Paddle type D Paddle type E
Replace 6680 in reference by 1234 Replace 6680 in reference by 1549 Replace 6680 in reference by 1564 Replace 6680 in reference by 1579

 

Consult us for flow detection values with these paddles. OEM paddles can be made on order (MOQ apply)

 

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Technical informations associated to this product

  • “Dimensions of PVC pipes and Europe pipes”

    1: Cleavable paddle 2: Plastic body and plastic ¾” BSPP union nut 3: Connection box 4: Adjustment screw 5: Pilot light Size and pressure Flow sensing: cleavable paddle Mounting: ¾” BSPP Union nut Contact: Reed switch, close on flow rise Electrical rating Mounting position Type PN10 RAX DN≥15 Main uses General application in flow detection. […]
  • Flow switches detection limits versus flow and pipe diameter

    1: Cleavable paddle 2: Plastic body and plastic ¾” BSPP union nut 3: Connection box 4: Adjustment screw 5: Pilot light Size and pressure Flow sensing: cleavable paddle Mounting: ¾” BSPP Union nut Contact: Reed switch, close on flow rise Electrical rating Mounting position Type PN10 RAX DN≥15 Main uses General application in flow detection. […]
  • Flow switches historical foreword

    In antiquity, the flow measurement was one of the first means of time measurement. But it was not until the steam engines development and the need to control their water supply, that measuring devices were developed.
  • Flow switches technical foreword

    A certain force is required to actuate the electrical contact device. It can range from a few tenths of grams for systems with reed contacts with a power rating of 10 to 20VA (0.5Amp), to 50 grams for snap action micro-switches with a 5Amp 250V rating