Vaisala HMW90 Series Humidity & Temperature Transmitter

Vaisala HMW90 Series Humidity & Temperature Transmitter are designed for indoor HVAC applications. They accurately measure relative humidity and temperature, ensuring stability and reliability. The series offers flexibility with various options and features. Transmitters come with a display and a sliding cover, either with an opening for the display or a solid front. You can choose from analog and digital output options, including special scaling and calculated parameters.

Dimensions

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

Quick & Easy To Install

Vaisala HMW90 series transmitters are quick and easy to install. Connect the wiring through the backplate, then easily snap on the electronics with the sensors. Configure the transmitter using accessible DIP switches 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. Just slide the cover to access offset trimmers for one-point calibration without interrupting the measurement. The display immediately shows the impact of any changes, making adjustments clear and easy. For two-point calibration, you can use a PC or the Vaisala HUMICAP Handheld Humidity and Temperature Meter Vaisala HM70 through a service port. With Vaisala HMW90 series transmitters, you can replace the measurement module yourself, which can be ordered separately 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 Vaisala HMW90 and Vaisala 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. Vaisala HMW90 series measures relative humidity and temperature in indoor environments, where high accuracy, stability, and reliable operation are required. Vaisala 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).

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.