Brochure

23
www.usa.siemens.com/hvac
Solar Impact Sensor
QLS60
Used as a demand sensor in
facilities where compensation
of solar radiation is required or
desired. To determine the
impact of solar radiation, the
sensor uses a solar cell that
acquires the level of radiation.
Part Number Switch Pipe Contact Power Paddle Material
Magnetic Reed Contacts SPDT
Diameter In.
15A 1A 24 Vac/Vdc High Grade Steel Non-metal
QVE1900U
n
1-1/4 to 8
n n n
QVE1901U
n
3/4 to 8
n n n
Liquid Flow Switches
QVE1901U
Flow switches detect the flow
of the medium to be monitored
by means of a paddle. If the
flow velocity in the piping falls
below the adjusted switch-off
value, the paddle in the
QVE1900U model actuates a
micro-switch with a dry contact
(SPDT), which closes the
contact. In the QVE1901U
model, the switching is
achieved through two opposite
magnets and a reed contact.
QVE1900U
Part Number Air Velocity (FPM) Output Measuring Range Power
0 to 10 Vdc 4 to 20 mA Relay Contact Adjustable 24 Vac
QVM62.1 0-3000
n
0 to 16 ft/s
0 to 33 ft/s
0 to 49 ft/s
n
Air Velocity Sensor
QVM62.1
The sensor is used to control
the air velocity to a constant
value, or to balance out
pressure fluctuations (supply or
extract air control). Using a
special thin-film sensing
element, the sensor operates
largely independently of the
direction of flow and is nearly
insensitive to any kind of dirt in
the air flow.
Part Number Output Range Power Housing
0 to 10 Vdc 40 to 20 mA W/m2 W/ft2 24 Vac 18-30 Vdc NEMA 4
QLS60
n n
0 to 1000 0 to 93
n n n