Vaisala HMW90 Series Humidity & Temperature Transmitter

Dpstar is a leader in environmental and industrial measurements. Curiosity and innovation are core values in our company. Our extensive knowledge and expertise are materialized in our selection of innovative products. Accurate measurements are essential for healthy indoor air and improving the energy efficiency of buildings. The unique, cutting-edge Dpstar sensor technologies are manifested throughout our versatile range of products. The transmitters have an exceptionally long lifetime and excellent measurement stability, thus being practically maintenance-free. These are among the many reasons why Dpstar’s products are a sustainable choice.

Wall-mounted Vaisala HMW90 Series HUMICAP Humidity and Temperature Transmitters measure relative humidity and temperature in indoor HVAC applications, where high accuracy, stability, and reliable operation are required. The flexible HMW90 series offers a variety of options and features. Transmitters include a display and a sliding cover with either an opening for the display or a solid front. Both analog and digital output options, including special scalings and calculated parameters are available.

Dimensions

Dimensions of HMW90 series transmitter cover (left) and mounting base (right).

Quick & Easy To Install

HMW90 series transmitters are quick and easy to install. The wiring is connected through the backplate and the electronics with the sensors can be snapped on easily after the wiring is complete. The transmitter is configured using DIP switches, which are accessible when the enclosure is open.

Digital Communication

The introduction of digital (BACnet/Modbus) communication to field-level devices brings many advantages. For example, all sensors can be centrally accessed and their performance can be easily monitored. Wiring is simple when multiple sensors are installed on the same bus. Sensors can be set up using standardized tools, and the system can be expanded with additional sensors quickly and conveniently. In addition, parameters influencing measurements, such as pressure or site elevation, can be centrally set and updated.

Wide Variety Of Calibration Options

On-site calibration and adjustment is exceptionally easy. The sliding cover exposes offset trimmers for one-point calibration without disturbing the measurement. The display instantly indicates the effects of changes, making it clear and convenient to make adjustments. A service port enables two-point calibration, using either a PC or Vaisala HUMICAPâ Handheld Humidity and Temperature Meter HM70. HMW90 series transmitters include a user exchangeable measurement module, which can be ordered as a spare part.

Models Available

• TMW92 T transmitter, current output
• TMW93 T transmitter, voltage output
• HMW92(D) RH+T transmitter, current output (with display)
• HMW93(D) RH+T transmitter, voltage output (with display)
• HMW95(D) RH+T digital (BACnet, Modbus) transmitter (with display)
• TMW90 T transmitter, configurable analog output model
• HMW90 RH+T transmitter, configurable analog/digital model

The HMW90 and TMW90 transmitters are available in two color options: standard white and black.

Applications

Typical applications include museums and archives, production and warehouse facilities, data centers, laboratories, and testing environments. 5-year warranty is valid for instruments purchased in 2021 and beyond. The HMW90 series measures relative humidity and temperature in indoor environments, where high accuracy, stability, and reliable operation are required. The HMW90 is a flexible product family with a variety of options and features, both analog and digital output models are available. The sensors are exceptionally easy to configuration, install, and adjust in the field. Calculated humidity parameters (Td, x, h, Tw, a, T-Td).