Vaisala HMW40 Operating Instructions

The HMW40U humidity and temperature converter adopts a static capacitive polymer film humidity sensor with a measurement range of 0-100% RH (condensation), an accuracy guarantee range of 10-90% RH, and a temperature measurement range of -5-55 ℃. The accuracy is ±0.3 ℃ (25 ℃).


Vaisala HMW40 Operating Instructions - cover page
Brand
Vaisala
Category
Other
Document type
Datasheet
Language
Japanese
Pages
1
File format
PDF
File size
12 KB
Published
06 April, 2012
Updated
30 September, 2023
Model
HMW40
MD5 checksum
626B9BB14ABB372411467BE8FD72B48D

About this manual

The HMW40 is an indoor wall‑mounted humidity and temperature converter that uses a capacitive polymer‑film sensor for humidity measurement. It provides 4‑20 mA output for humidity and a 0‑5 V output for temperature.

The device operates over a wide temperature range, is housed in ABS resin, and is supplied with a 24 V power source. It is lightweight (≈60 g) and compact (80 × 80 × 26 mm). This manual is written in Japanese.

What's inside

  • Product Specifications
  • Sensor Type
  • Measurement Range
  • Accuracy
  • Output Signals
  • Power Supply
  • Housing and Dimensions

Specifications

ModelHMWM0U
Humidity sensor typeCapacitive polymer‑film
Humidity range0‑100 % RH
Temperature range (operating)-40 °C to +60 °C
Overall accuracy (humidity)±0.3 % RH (at 25 °C)
Temperature dependence of humidity measurement0.01 % RH/°C
Humidity output4‑20 mA
Supply voltage24 V DC
Power consumption120 mW
Housing materialABS resin
Weight≈60 g
Dimensions (assembled)80 × 80 × 26 mm

Frequently asked questions

What is the overall humidity accuracy of the HMW40?

The overall humidity accuracy is ±0.3 % RH at 25 °C.

How does temperature affect humidity measurement?

The humidity measurement has a temperature dependence of 0.01 % RH per degree Celsius.

What are the operating temperature limits for storage?

The device can be stored between –40 °C and +60 °C.

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