HygroPro User’s Manual Page 1
Chapter 1: Installation
1.1 Introduction
The HygroPro Moisture Transmitter is a compact, intrinsically-safe,
loop-powered, 4-20 mA transmitter that provides accurate dew/frost
point measurements over a range of –110 to 20°C (-166 to 68°F). It
features an integrated display and a six-button keypad, and it is
housed in an IP67/Type 4X enclosure.
The HygroPro transmitter uses an aluminum oxide moisture sensor,
and it includes a temperature thermistor and a pressure transducer on
a common mount for calculation of parameters such as:
• ppm
v
in gases
• ppm
w
in liquids
• pounds per million standard cubic feet in natural gas
• process relative humidity.
IMPORTANT: To install the HygroPro in a hazardous (classified) area,
see Hazardous Area Wiring Connections on page 15.
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