Accuenergy AcuHUM-OA-A-A-01 Offers

Advanced digital polymer sensing technology provides precise relative humidity (RH) measurement, the AcuHUM OA series outdoor air relative humidity sensor offers long-term stability, fast response time, and ability to recover from condensation. The RH sensor can be mounted onto a vertical surface for monitoring outdoor RH/ temperature. With an IP65 rated enclosure, it is suitable for sheltered outdoor locations and protect against dust ingress and water. The AcuHUM OA sensor also features an optional thermistor, RTD, or transmitter to conveniently provide a temperature and RH measurement in a single device.

An outdoor relative humidity and temperature sensor is an electrical device using digital polymer sensing technology to measure the amount of moisture (relative humidity) and the ambient temperature in the outdoor environment. The sensor transmits the data to a Building Automation System to control economizers, fans, mechanical heating, and cooling to provide optimal indoor comfort for occupants and ensure HVAC/R equipment is running efficiently.

Features

• IP65 enclosure protects RH sensor from dust ingress and water moisture, ideal for outdoor applications.
• Quick installation features including quarter turn quick release screws on enclosure cover and push button terminal block.
• ±2% (25°C, 20 to 80% RH) relative humidity measurement with optional temperature measurement up to 0.36°F (0.2°C) accuracy.
• Fast response time of <10 seconds, and low humidity drift <±0.5% RH per year.
• 4 to 20 mA and 0 to 10 V DC output transmitter options ideal fit with BAS controllers used in rooftop HVAC/R systems and energy management systems.
• 100Ω Platinum and 1KΩ Platinum/Nickel RTD sensor options for high precision temperature measurements.
• 10KΩ Type-II, 10KΩ Type-III, and 20KΩ resistive thermistor options for a wide range of different applications.

Applications

Economizer Control

The AcuHUM OA monitors outdoor relative humidity and dry-bulb temperature. This data can be used to calculate the enthalpy of the outside air to control economizers in air handling units. The calculated outdoor enthalpy will be used to determine if the conditions are ideal to use outdoor air for more efficient cooling instead of mechanical air conditioning. Using outdoor air for cooling has significant energy savings and improved indoor air quality.

Washdown Applications

Washdown applications are often integrated into industrial operations where the equipment must be regularly cleaned. The AcuHUM OA sensor monitors the RH conditions to prevent microbial growth to maintain environmental compliance and maintain product quality. The sensor comes standard with an IP65 gasketed enclosure providing robust protection against water and moisture, ideal for a low-pressure water jet in a washdown application.

Calculating Dew Point

The AcuHUM OA readings can be used to calculate dew points, help prevent condensation in industrial facilities and sensitive equipment, and also optimize energy usage of mechanical cooling systems and dehumidifiers. Managing the dew point is crucial for improving indoor air quality and occupant comfort by preventing bacterial growth and reducing the risk of mold.