What does the shop sell?

Spare parts for gas and oil burners and boilers: gas valves, nozzles, ignition electrodes and transformers, pressure switches, flame detectors, fuel pumps, servomotors and burner control boxes.

How large is the catalogue?

Over 100,000 part numbers from every major manufacturer, brought into one structure so that parts from different brands can be compared and replaced.

Can I find a part by its number?

Yes. The order number, the manufacturer model and any supplier code all lead to the same part, so a number from an old invoice or a nameplate is enough.

What if the part is discontinued?

The catalogue records what the manufacturer replaced it with, and which parts from other brands do the same job — together with the conditions that apply.

The company is based in London and ships across the United Kingdom, Europe and the rest of the world.

Is the shop open yet?

The catalogue is being assembled now. The shop opens as soon as it is ready.

Honeywell Water flow sensor C7195A 2001B

SKU C7195A 2001B Brand Honeywell

Photos

Key specifications

Connection thread size	Variable by model
Operating principle	paddle, turbine, or ultrasonic
Sealing	gasket or O-ring
Switching mechanism	reed switch

all specifications (4) ↓

28.51 EUR

25.92EUR

in stock · 2

incl. 21% VAT · 21.42 EUR excl. VAT · shipping calculated at checkout

Worldwide shipping from stock
Original manufacturer part
Dispatch within 24 h for stocked items

Description

This water flow sensor detects the presence or rate of water flow in hydronic circuits. Depending on the model, it operates on a paddle, turbine, or ultrasonic principle, and uses a reed switch as the switching mechanism. The connection thread size varies by model. Sealing is done via a gasket or O-ring.

Further details

Application	heating, cooling, ventilation, and water supply systems; boiler plants, HVAC systems, heat exchange equipment, automated engineering systems
Installation location	Flow pipe between circulation pump and system
Primary function	fluid flow detection and monitoring; prevents startup without required flow; pump run-on delay, frost protection, burner lockout

Choosing and fitting

When selecting a replacement for this type of sensor, confirm the electrical output type (dry contact, open collector, or analogue) and the connection thread size. Verify the flow rate threshold at which the sensor switches, and check the maximum operating temperature and pressure ratings against the circuit's conditions. Ensure the replacement is compatible with the control board's input requirements, and inspect the sealing gasket or O-ring for integrity before installation.

Signs of failure

Common failure modes include mechanical blockage of the moving element, loss of magnetisation in the reed switch, and corrosion of electrical contacts. Poor pipe alignment can also cause malfunction. To diagnose, inspect for these issues and compare the sensor's switching behaviour with the expected flow rate.

All specifications

Connection thread size	Variable by model
Operating principle	paddle, turbine, or ultrasonic
Sealing	gasket or O-ring
Switching mechanism	reed switch

Part numbers

SKU	C7195A 2001B
Additional article	534.208.004