Description - Honeywell C7195A Product Handbook

DESCRIPTION

The C7195A is a mechanical water flow sensor (fig. 2.).
A turbine rotates with water flow. The turbine supports a
magnet which rotates in front of a Hall effect sensor.
This Hall effect sensor picks up the field of the magnet giving
a pulsed output.The output is directly proportional to the water
flow through the sensor.
This frequency output is easily processed by an electronic
controller which can then modulate the burner load (for
feed--forward loop) or simply open heat demand when the
flow reaches its defined minimum rate (electronic flow switch).
The sensor body is constructed from pressure and
temperature resistant plastic, with easy connections to
traditional pipes used in domestic appliances.
Feed forward control loop concept
See fig. 1.
Flow rate input
for modulation
Cold water
C7195A
Fig. 1. Feed forward control loop concept
Fig. 2. Open view C7195
2
Electronic
Controller
Modulating control
Temperature feed back
Heat
Option: Compensation
supply
of tolerances and
hysteresis
T7335
_C
EN2R- -9029 0101R2- -NE
Domestic
hot water