Each plate contained an Onset HOBO UX90-005 occupancy sensor and an Onset HOBO U12-012 temperature, relative humidity, and light sensor. The occupancy sensors monitored occupancy by sensing movement up to approximately 5 m away from the plate. The wall plates additionally contained a Decagon EM-50 data logger with three VP3 sensors that measured equilibrium relative humidity and near-surface temperatures (one on each material). In one office in each city, an additional two VP3 sensors were used to measure the same conditions on the drywall samples on the floor and ceiling. All measurements were recorded every 5 min, except for the occupancy sensors, which recorded the time of each change of state (e.g., going from occupied to unoccupied). Data were downloaded from the data loggers once a month with the HOBOware 3.5.0 and the Decagon ECH2O Utility software packages.
U12 012
Manufactured by HOBO
The U12-012 is a high-precision digital data logger capable of recording a wide range of environmental parameters. It features 12 universal analog input channels and can measure various sensor types, including thermocouples, RTDs, and voltage inputs. The device is designed for accurate and reliable data acquisition in a variety of applications.
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Lab products found in correlation
3 protocols using u12 012
1
Detailed Microclimatic Monitoring Protocol
2
Monitoring Shed Thermal Environment for Poultry
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In order to monitor the internal thermal environment of the sheds, a datalogger of the HOBO® brand, model U12-012, was installed. The datalogger was positioned in the center of the sheds, at the same height as that of the birds, to record data on temperature and relative humidity. This equipment was programmed to record the temperature and relative humidity of the air at 5 min intervals for 24 h throughout the entire observational study.
From the temperature and relative humidity data, the Temperature and Humidity Index (THI) was calculated for each shed internal environment, using Equation (1), described by [42 (link)] and used for birds by [43 (link)].
where: T = temperature dry bulb in °C; RH = relative humidity of the air (%).
From the temperature and relative humidity data, the Temperature and Humidity Index (THI) was calculated for each shed internal environment, using Equation (1), described by [42 (link)] and used for birds by [43 (link)].
where: T = temperature dry bulb in °C; RH = relative humidity of the air (%).
3
Monitoring Poultry Thermal Comfort with HOBO Dataloggers
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To monitor the thermal environment, a HOBO ® datalogger was installed in each shed, model U12-012, positioned close to the centre of the installation and at the height of the hens. The dataloggers recorded the temperature and relative humidity of the air at 5 min intervals throughout the study period.
Considering the situation of complete confinement of the birds in the completely enclosed installations, the exhaust fans fulfilled the function of guaranteeing a minimum ventilation for the exchange of air with the external environment.
From the temperature and relative humidity data, the Temperature and Humidity Index (THI) was calculated for each internal environment using Equation 1, which was used for birds by Biaggioni et al. (2008) .
Where: DBT = dry bulb temperature (°C); ARH = air relative humidity (%).
For laying hens, temperatures above 28º C and THI above 78 are considered situations in which the birds are outside the thermal comfort zone and, therefore, characterizing stress by heat (Biaggioni et al., 2008) . On the other hand, temperatures and THI below 15º C and 59, respectively, are considered cold stress.
Considering the situation of complete confinement of the birds in the completely enclosed installations, the exhaust fans fulfilled the function of guaranteeing a minimum ventilation for the exchange of air with the external environment.
From the temperature and relative humidity data, the Temperature and Humidity Index (THI) was calculated for each internal environment using Equation 1, which was used for birds by Biaggioni et al. (2008) .
Where: DBT = dry bulb temperature (°C); ARH = air relative humidity (%).
For laying hens, temperatures above 28º C and THI above 78 are considered situations in which the birds are outside the thermal comfort zone and, therefore, characterizing stress by heat (Biaggioni et al., 2008) . On the other hand, temperatures and THI below 15º C and 59, respectively, are considered cold stress.
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