Specialty Sensors

Overview

Reference sensor for HVAC applications where compensation of solar radiation is required or desired
Repositioning Blinds / Lighting Controls, Solar compensation for Heating / Cooling Applications

FEATURE	FUNCTION	BENEFIT
Small compact housing	Easy handling	Enables flexible mounting locations
NEMA 4 equivalent rating	Sealed with a gasket to keep out rain and moisture	Promotes outside mounting without damaging internal photo measurement cell
0-10 Volt or 4-20mA (selectable) output	Provides signal to controller	Linear over the measured solar radiation range Output does not have to be converted from a sinusoidal function
0-10 Volt or 4-20mA (selectable) output	Provides signal to controller	Standard outputs, provides flexibility depending on controller input type

FEATURE	FUNCTION	BENEFIT
Mounting flange	Secures the sensor to the ductwork	Allows the installer to vary the probe insertion length into the duct space for best control
Mounting flange dampening gasket	Minimizes vibration to the sensor	Enables sensor to stay firmly mounted
Graduated probe	Measures insertion length	Ensures maximum flow accuracy
Flow directional arrow	Assures correct probe orientation	Provides an accurate flow reading
Connection cable	Housing-to-probe electrical connection	Flexibility in mounting
Jumper selectable flow range	Field adjustable flow ranges	Application flexibility

Demand-controlled ventilation of wet zones: This saves energy, and prevents damage resulting from humidity.
Booster pumps: Pumps activated in accordance with demand deliver the water pressure called for by the system.
Protection against dry-running: Motors are switched off when there is no flow.
Instantaneous District HW heaters: The heater is switched on when the water tap is opened.
General use: Independent monitoring of liquid flows in HVAC facility.

QVE1900U

FEATURE	FUNCTION	BENEFIT
Detachable steel paddles (4)	Used for measuring flows in different pipe sizes	Provides correct flow measurement based on pipe diameter
Adjustment screw	Sets switching threshold	Allows switching point to be varied based on flow rate
Single part number	Handles multiple line sizes	Easier for product selection/ordering

QVE1901U

FEATURE	FUNCTION	BENEFIT
Flexible, trim-able paddle	Used for measuring flows/triggering based on flow rate in different pipe sizes Using a small pair of pliers, the length of the paddle can be easily shortened to the required size	Provides correct flow measurement based on pipe diameter without multiple paddle components No more need for making bothersome adjustments with screw drivers and sheet metal
Contact-free reed switch	No reset spring No aging or fatigue on the mechanical components	Stable switching points and insensitivity to dirt and icing
Compact size and light weight	Simplifies mounting	Useful for confined spaces where access is restricted
Glass fiber-reinforced plastic paddle	De-zincification is impossible	Avoids paddle rupture that can occur with sheet steel paddles that are exposed to poor water quality over longer periods of time
Glass fiber-reinforced plastic paddle	Gives paddle rigidity	Resistant to scale deposits, unlike steel paddles
Single part number	Handles multiple line sizes	Easier for product selection/ordering