HUMIDITY
536
HUMIDITY
9
WHEN YOU NEED IT RIGHT, RIGHT NOW, CALL KELE.
kele.com888-397-5353 USA
March 2014
3% DUCT HUMIDITY AND TEMPERATURE TRANSMITTER
HMD42, HMD53
Accuracy
Humidity ±3% RH
Temperature ±0.72°F (0.4°C)
Stability RH: ±2% RH/2 years
Supply Voltage
HMD42 10-35 VDC
HMD53 10 to 35 VDC, 9 to 24 VAC @ 0.3
VA (signal dependent) @ 0.3 VA
(signal dependent)
Signal Output
HMD42 4-20 mA
HMD53 0 to 1, 0 to 5, 0 to 10 VDC
Maximum Output
Impedance mA 500Ω
Minimum Output
Impedance VDC 20 kΩ
Measurement Range
Humidity 0 to 100%
Temperature -40° to 140°F (-40° to 60°C)
Sensing Technology
Humidity Replaceable Vaisala INTERCAP®
Temperature Pt 1000 RTD
Operating Humidity 0 to 100% RH
Operating Temperature 23° to 131°F (-5° to 55°C)
Enclosure Cast aluminum
Enclosure Rating NEMA 4 (IP65)
Probe Stainless steel
Wiring Terminations Screw terminal
Approvals CE (EN61326-1, EN55022)
Weight 0.6 lb (0.3 kg)
Warranty 1 year
DESCRIPTION
The Vaisala HMD42 and HMD53 Duct Mounted Humidity
Transmiitters are designed for building automation
applications. They combine reliable operation with excellent
stability, providing low cost of ownership to the user. The
HMD42 and HMD53 transmitters measure humidity with a
±3% RH accuracy and temperature with a ±0.54°F (±0.3°C)
accuracy. They feature various selectable analog output
signals and they can be powered by either AC or DC voltage.
The HMD42 and HMD53 humidity transmitters use
the interchangeable Vaisala INTERCAP® Sensor. The
transmitters require no recalibration if the sensor is changed.
The duct mount HMD42 and HMD53 transmitters can be
installed in various measurement environments due to the
robust IP65 (NEMA4) rated metal enclosure which protects
the sensor from dust and splashes of water.
FEATURES
• Duct mount
• ±3% RH accuracy
• No recalibration required
• Easy to replace interchangeable sensor
• Current or selectable voltage output
SPECIFICATIONS
Lid
Screw terminal
Screws
18941HM
Glands
10528HM
INTERCAP
®
sensor
part no. 15778HM
Membrane filter
part no. DRW010525
Stainless stell
sintered filter
part no. HM46670SP
Electronics, Accessories, Spare Parts
Removing and Reinstalling the Sensor Head
Replacement of the Intercap Sensor
If the INTERCAP
®
sensor is damaged, remove it and insert a
new one. Recalibration is not needed.
If the filter is dirty, replace it to ensure a maximum lifetime and
fast response for the sensor. Do not attempt to clean the filter.
1.
2.
3.
4.
5.
6.
Open the lid.
Disconnect the screw terminal.
Open the screws (2 pcs.)
Pull the sensor head out carefully.
To reinstall, push in the sensor head.
Reassemble in reverse order.
PRODUCT DIAGRAM
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