This document describes several products from Vaisala that are used to measure environmental conditions and moisture levels in power industry applications. It discusses sensors for measuring moisture in turbine inlet air, humidity in hazardous areas, outdoor weather conditions, moisture in transformer oil and lubricating oils, dewpoint in SF6 gas and other gases, and online measurements for switchgear. The products are designed for low maintenance use in power facilities and provide real-time monitoring and trend data to help avoid equipment issues.

1. Power Industry
Measurement
Moisture in Turbine Inlet Air
• Designed for use in monitoring the intake of power turbines
• Ideal for high humidity environments - utilizing a patented, warm
sensing probe
• Virtually no maintenance sensor – long calibration intervals with
no cleaning required.
Humidity in Hazardous Areas
• Safe operation with the entire transmitter in hazardous areas:
Division 1 and 2 (USA, Canada)
• Intrinsically safe
• Outdoor probe versions and turbine inlet models available
Outdoor Weather Measurement
• Measure wind speed and direction, liquid precipitation,
barometric pressure, temperature and relative humidity
• Simple to install, easy to integrate
• Durable and virtually maintenance-free
Vaisala HUMICAP®
Dewpoint
Transmitter HMT300TMK
Vaisala HUMICAP®
Humidity and
Temperature Transmitter Series HMT360
Vaisala Radiation
Shield Series DTR500
Vaisala Weather
Transmitter WXT520

2. Vaisala Instruments for the Power Industry
Moisture in Transformer
and Lubricating Oil
• Measures moisture levels in power turbine
lubrication systems and transformer insulating oils
• See moisture fluctuations in varying temperature
and load conditions
• Avoid sampling and waiting for lab results – Act
on real time trend data
• Easy, affordable and fast - installation in minutes
into a live transformer
Vaisala Inc.
10-D Gill Street
Woburn, MA 01801
Tel: + 1 888 VAISALA (824 7252)
Fax: + 1 781 933 8029
Email: instruments@vaisala.com
For other Vaisala
locations visit us at:
www.vaisala.com
Dewpoint in SF6, Air and
Nitrogen
• Displays dewpoint, ppmw in SF6, ppmv,
temperature and more
• Graphical interface with language-driven menus
and data logging
• Measures in pressures up to 280 psig
• Fast response time
• Portable and easy to use
• Complete kit with sample components available
Vaisala DRYCAP® Hand-held
Dew Point Meter DM70
Online Measurements for Switchgear
• Continuous measurement provides real time trend data
• Minimize sources of leaks with one instrument containing multiple sensors
• Avoid SF6 sampling, recycling and waiting for lab results
• Integrate directly into condition based monitoring and data acquisition systems
Vaisala Multiparameter Transmitter
DPT145 for SF6 Gas
MMT330
MMT310