Transmitters for air velocity monitoring

GS41AV(24V)

The GS41AV(24V) transmitter is designed for use with the E plus E series of air velocity sensors, types EE660 or EE576. Highly accurate readings can be achieved down to 0m/s. The combination has proved ideal where air laminar flow in ducted heating / ventilation systems in domestic or industrial installations needs to be monitored.

The E plus E sensor head uses a field proven hot-film element to measure velocity by detecting the change in temperature as air moves past it, cooling the element. This technique means the sensor is less sensitive to dust and dirt, giving very stable results. An alignment strip along the probe's tube allows the user to set a measured probe depth during mounting in a pipe or duct. This provides a method for repeatedly mounting probes to an accurate known depth.

The value logged is the rolling averaged value over a three minute cycle, meaning that transient values or deviations from the norm are not lost when logging.
GS41AV(24V)

GS41AV(24V)

Sensors

We supply the GS41AV(24V) without a sensor, if you require a sensor, please order this from Eltek separately. You will also need to purchase an Eltek power supply unit (MP24U) and the required interface cable (LC41AV-660 or LC41AV-576).

EE660

The E plus E EE660 is a sensor for measuring very low air velocity. A thin film sensor operates on the hot film anemometer principle and provides excellent accuracy to 0.15m/s (30ft/min) whilst demonstrating a high insensitivity to pollution. The EE660 is non directional and also ideal for in -duct laminar flow applications.

The EE660 operates from a 24VDC supply and when used with the Eltek GS41AV(24V) transmitter provides comprehensive air velocity data, ideal for building ventilation studies before and after retrofits.

EE660 Air Velocity Probe

EE660

EE576

The E plus E EE576 sensor head uses a field proven hot-film element to measure velocity by detecting the change in temperature as air moves past it, cooling the element. This technique means the sensor is less sensitive to dust and dirt, giving very stable results.
An alignment strip along the probe's tube allows the user to set a measured probe depth during mounting in a pipe or duct. This provides a method for repeatedly mounting probes to an accurate known depth.

EE576 Air Velocity Probe

EE576

Accessories

WBG Wall bracket docking kit

This kit enables fitment of the transmitter's built-in wall bracket to difficult or uneven surfaces. The kit provides additional docking security.

The following products are supported:

  • All GD, GC, GL and GS series transmitters
  • RP250GD repeater and RC250 receiver

WBG

Common GenII Transmitter Specification

RF specification: EN300-220
RF power: 10mW
Environment specification  
  Compliant to EN300-220: -10 to +55°C
  Actual: -30 to +65°C
  Humidity: 100% non condensing
Environmental rating: IP40
Dimensions (footprint): 78 x 41mm
Transmission interval range: 1 sec to 4 hours
Indicator (red LED): transmit active/on/off
Control switch (concealed): test mode / hibernate
Antenna socket: SMA

Transmitter Specification

Model(s) Sensors
GS41AV(24V) 1 x averaged value. A rolling average from 18 samples taken at fixed 10 second intervals.
1 x calculated minimum value of the 18 samples
1 x calculated maximum value of the 18 samples
1 x instantaneous value (last value measured)

Documentation

Common to all transmitters

Gen II Quick Start Instructions

Specific to this family of transmitters

GS41AV(24V) - User instructions

GS41AV(24V) - Air velocity datasheet