What Is Climomaster Anemometer?
Climomaster Anemometer is a multi-functional anemometer manufactured by Canomax, Japan. It is a portable anemometer for measuring indoor environment.
It can measure wind speed, wind temperature, and humidity at the same time. In addition, it can calculate discomfort index, wind volume, and dew point. The major difference between this anemometer and the Anemomaster, also manufactured by Canomax Japan, is that it can simultaneously measure humidity.
It has a high measurement accuracy of 2%, which is in the top class of thermal anemometers, and a wide measurement range of -20°C to 70°C. In addition, the user can exchange probes according to his/her purpose, making it applicable to various situations, such as measurement of indoor air environment and maintenance and inspection of air conditioning equipment.
Applications of the Climomaster Anemometer
Climomaster Anemometer is used in the fields of indoor environment, air conditioning equipment, and inspection control. Specific applications include maintenance and management of air conditioning systems and environmental evaluation of clean rooms. The probe equipped with a sensor is connected to the main unit by a cable, and the probe is directly placed near the exhaust or other airflow opening of an air conditioning system to make measurements. ClimoMaster not only measures air velocity, but also airflow.
The Climo-Master can simultaneously measure not only air velocity, but also air volume, temperature, and pressure. In the field of indoor environment measurement, it can be used to measure the air environment in homes and office buildings, etc., in accordance with the Building Sanitation Law, air conditioning control and environmental measurement in buildings and factories, and measurement of the effect of smoke separation in accordance with the Health Promotion Law.
In the field of inspection and control, it can be used to measure air velocity inside PCs and other equipment to inspect cooling effectiveness, and to test product performance such as drying effectiveness rates.
Principle of Climomaster Anemometer
1. Principle of Hot-Wire Anemometer
Figure 1. Principle of hot-wire anemometer
The Climomaster Anemometer is a hot wire anemometer (thermal anemometer). In a hot-wire anemometer, the anemometer sensor is heated. When wind hits the sensor, heat is lost and the temperature of the sensor changes.
As the temperature changes, the resistance of the sensor also changes, and the faster the wind speed, the greater the change. Therefore, by measuring the resistance (or current), it is possible to determine the wind speed.
There are two types of hot wire anemometers: constant temperature type and constant current type. The former keeps the fine wire temperature Tw constant, while the latter keeps the current I constant. The constant-current type, which keeps I constant, is simpler as an electrical circuit, and the Climomaster Anemometer uses the constant-temperature type, which offers superior feedback control.
In this method, the sensor is controlled by a feedback circuit to maintain a constant temperature at all times, but the amount of heat lost from the sensor (amount of radiant heat) varies with the wind speed. The amount of electric current flowing through the sensor to compensate for this changes, and this is how the wind speed value is determined.
2. Principle of Hygrometer
Figure 2. Principle of the hygrometer
There are two types of humidity measurement: capacitance type and resistance type. The capacitance type has the advantage of being resistant to low humidity and having a fast response time. On the other hand, the resistive type is inexpensive, resistant to noise, and can be miniaturized, but cannot measure low humidity.
The CLIMOMASTER uses the capacitance type. It consists of a glass substrate, bottom electrode, polymer thin film, and top electrode from the bottom, and the electrodes capture changes in dielectric constant due to absorption and desorption of moisture from the polymer thin film. This change in capacitance is proportional to relative humidity, which is detected.
Features of the CLIMOMASTER
Figure 3. About omnidirectional
Climomaster Anemometer is a portable anemometer with a high measurement accuracy of 2% as a hot-wire anemometer. Even though it is a portable anemometer, it has a wide range of functions such as simultaneous measurement of wind speed, wind temperature, and humidity, and calculation functions for air volume and dew point.
Eight types of probes are also available as of May 2023. Each probe is roughly divided into two ranges of wind speed measurement: 0.01~30 m/s and 0.01~5.00 m/s. Omnidirectional probes are also available, which are useful when the exact direction of the wind is not known. The omni-directional probe allows you to measure wind speed without worrying about the direction of the probe, which can measure the absolute value of wind speed in any direction.