The HIH-5030 and HIH-5031 humidity sensors are ideally suited in battery-powered systems where the supply is a nominal 3 V as they can operate down to a low 2.7 V. They have been specifically designed for high volume OEM (Original Equipment Manufacturer) users. These sensors utilise a near linear voltage output making direct input to a controller or other devices possible. They are ideally suited for low drain, battery operated systems with a typical current draw of only 200 μA.

The HIH-5030 is a covered integrated circuit humidity sensor.
The HIH-5031 is a covered, condensation-resistant, integrated circuit humidity sensor that is factory-fitted with a hydrophobic filter allowing it to be used in condensing environments including industrial, medical and commercial applications.

Potential Applications:
Industrial air compressors
HVAC (Heating, Ventilation and Air Conditioning) equipment
Battery-powered systems
Drying equipment
OEM assemblies
Office automation equipment
Process equipment
Refrigeration (includes bulk and transport systems)
Telecommunications cabinets
Weather stations and meteorology equipment
Hospital air compressors
Infant incubators
Microenvironments
Sleep apnoea equipment
Treadmill stress monitoring equipment

Features:
Operates down to 2.7 V, often idea in battery-powered systems where the supply is a nominal 3 V
Moulded thermoset plastic housing
Near linear voltage output vs %RH
Laser-trimmed interchangeability
Low power design
Enhanced accuracy
Fast response time
Stable, low drift performance
Chemically resistant

This humidity sensor from Honeywell is used to monitor humidity in equipment such as air compressors, refrigeration systems and meteorology instruments. It's a surface-mounted device (SMD), which means it's quick and easy to install as there's no risk of lead misalignment to the printed circuit board (PCB) through-holes. This sensor has a hydrophobic filter, making it condensation-resistant and safe for use in condensing environments. It has a low current draw of 200μA and a minimum operating supply voltage of just 2.7V, so it's an energy-efficient choice for use with low-drain, battery-powered systems.

• Moulded thermoset plastic housing for durability and impact resistance
• Compact dimensions of 8.59 (length) x 4.17 (width) x 2.67mm (height) for use in areas with limited space
• Wide operating temperature range of -40°C to +85°C for use in demanding conditions
• Multilayer construction for resistance to dust, dirt, oils and common environmental chemicals

• Infant incubators
• Telecommunications equipment
• Weather stations

This sensor has a relative humidity (RH) accuracy of +3%, giving you a high degree of precision.

Temperature & Humidity Sensors, Honeywell