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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	Cleavable paddle
Main housing material	PPO, fiber glass reinforced
Paddle material	PPO
Mounting position	Vertical, with paddle downside
Mounting type	¾” BSPP Union nut
Voltage	250V
Electrical rating	16A
Ingress protection	IP65
Electrical connection type	connection box
Maximum flow detection (L/min)	740
Minimum flow detection (L/min)	2.7
Calibration (gr)	3, 7, 14
Nominal pressure at 20°C	1MPa (PN10)
Max operating temperature (°C)	80
Liquids temperature range (°C)	5~100

SKU: N/A Category: Paddle flow switches Tags: pilot light, flow switch, reed switch, built-in relay, paddle, 3/4" union nut, cleavable

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

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)

Show references

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)

Downloadables

Datasheet

Technical informations associated to this product

“Dimensions of PVC pipes and Europe pipes”
Flow switches detection limits versus flow and pipe diameter
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

Calibration (Calibration force ±15%, measured at end of paddle N°1)
Low span end: 3gr	Middle span:7gr	High span end:14 gr
RAX636680G35N00C	RAX676680G35N00C	RAX6E6680G35N00C

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

Functional principle

Main references (With type A cleavable paddle)

Downloadables

Datasheet

Related products

Technical informations associated to this product

“Dimensions of PVC pipes and Europe pipes”

Flow switches detection limits versus flow and pipe diameter

Flow switches historical foreword

Flow switches technical foreword

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