HD403TS_1
HD403TS_2HD403TS_3HD403TS_4HD403TS_5

HD 403TS , HD 4V3TS – Active Hotwire Air Speed Transmitters

The HD403TS… series of hotwire air speed transmitters are used for measuring and controlling
air speed in ventilation ducts, clean rooms, extractor fans, as well as monitoring air
quality (IAQ), etc. These transmitters are equipped with a hotwire sensor, in the directional
or omnidirectional version. The HD403TS… series of transmitters have a 4…20mA output,
while the HD4V3TS… series have a 0…10Vdc output.
Two measuring ranges are available: 0.20…40m/s for …S1 and …S3 models with directional
probe and 0.1…5.00m/s for …S2 and…S4 models with omnidirectional probe.

Product Description

The HD403TS… series of hotwire air speed transmitters are used for measuring and controlling
air speed in ventilation ducts, clean rooms, extractor fans, as well as monitoring air
quality (IAQ), etc. These transmitters are equipped with a hotwire sensor, in the directional
or omnidirectional version. The HD403TS… series of transmitters have a 4…20mA output,
while the HD4V3TS… series have a 0…10Vdc output.
Two measuring ranges are available: 0.20…40m/s for …S1 and …S3 models with directional
probe and 0.1…5.00m/s for …S2 and…S4 models with omnidirectional probe.

Installation notes
• The probe must be used with clean air only and humidity below 80%.
• In …S1 and …S3 directional probes, the sensor hole must be oriented in the same direction
as the fl ow: turn the probe so that the displayed speed will be the highest, at constant
fl ow.
• To fi x the probe of …S1, …S2 and …S3 models inside a ventilation duct, a pipe ,etc. use
a PG9 or PG11 metal cable gland according to the shape or a connection equipped with a
¼” rubber ring.

• The transmitters are factory calibrated and no further adjustments are required.
• Select the response time by using the JP jumper: in the FAST position, the response time
is 0.2s, in the SLOW position is 2s. Set the jumper on SLOW in case of turbulence, otherwise
please select the FAST position.

Electrical connections
Power supply and output
Power the instrument at the voltage shown in the electrical specifi cations: power supply terminals
are marked as +Vcc and GND. The output signal comes from VEL and GND terminals.
To make the connection, please use a three-wire cable as shown in the drawing below.

 

ORDERING CODES
HD403TS1: Active hotwire air speed transmitter with 4…20mA output. Measuring range:
0.20…40m/s. Directional probe Ø=8mm, cable L=2m.
HD4V3TS1: Active hotwire air speed transmitter with 0…10Vdc output. Measuring range:
0.20…40m/s. Directional probe Ø=8mm, cable L=2m.
HD403TS2: Active hotwire air speed transmitter with 4…20mA output. Measuring range:
0.1…5.00m/s. Omnidirectional probe Ø=8mm, cable L=2m.
HD4V3TS2: Active hotwire air speed transmitter with 0…10Vdc output. Measuring range:
0.1…5.00m/s. Omnidirectional probe Ø=8mm, cable L=2m.
HD403TS3: Active hotwire air speed transmitter with 4…20mA output. Measuring range:
0.20…40m/s. Flexible directional probe, Ø=8mm, cable L=2m.
HD4V3TS3: Active hotwire air speed transmitter with 0…10Vdc output. Measuring range:
0.20…40m/s. Flexible directional probe, Ø=8mm, cable L=2m.
HD403TS4: Active hotwire air speed transmitter with 4…20mA output. Measuring range:
0.1…5.00m/s. Omnidirectional probe with wired protective cover Ø=80mm. Equipped
with tripod.
HD4V3TS4: Active hotwire air speed transmitter with 0…10Vdc output. Measuring range:
0.1…5.00m/s. Omnidirectional probe with wired protective cover Ø=80mm. Equipped
with tripod.

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