best hidden gps tracker for car refers to a device or device that can convert temperature and humidity values into signals such as pulses and numbers that can be easily measured and processed. The best hidden gps tracker for car on the market generally measures the amount of temperature and relative humidity, and is divided into wired and wireless best hidden gps tracker for car. What are the best hidden gps tracker for car selection?
First, select the best hidden gps tracker for car with the appropriate measurement range
As with measuring weight or temperature, choosing the best hidden gps tracker for car starts with determining the measuring range. In addition to meteorological and scientific research departments, temperature and humidity measurement generally does not require full wet range (0-100%RH) measurement, according to business needs to choose the right equipment is very important.
Second, understand the measurement accuracy of the best hidden gps tracker for car
Measurement accuracy is the most important indicator of the best hidden gps tracker for car, and every percentage point increase is a step up, or even a grade, for humidity detection equipment. Because to achieve different accuracy, its manufacturing costs vary greatly, and the price is also very different. So the user must be tailored to suit, should not blindly pursue "high, fine, sharp". If the best hidden gps tracker for car is used at different temperatures, the indication value should also consider the influence of temperature offset.
Relative humidity is a function of temperature, which heavily affects the relative humidity in a given space. The temperature varies by 0.1 ° C. Will produce a humidity change of 0.5%RH (error). If it is difficult to achieve constant temperature in the use of the occasion, it is inappropriate to propose too high humidity measurement accuracy. In most cases, if there is no accurate temperature control means, or the space being measured is not sealed, an accuracy of ±5%RH is sufficient.
for the local space that requires accurate control of constant temperature and humidity, or the occasion that needs to track and record humidity changes at any time, the best hidden gps tracker for car with an accuracy above ±3%RH is selected. The accuracy is higher than the requirement of ±2%RH, I am afraid that even the standard humidity generator of the calibration equipment is difficult to do, let alone the detection equipment itself. Relative humidity measuring instruments, even at 20-25 ° C, to achieve 2%RH accuracy is still very difficult. Usually the characteristics given in the product data are measured at room temperature (20 ° C ±10 ° C) and in clean gases.
Three, understand the best hidden gps tracker for car time and measurement offset
In actual use, due to the influence of dust, oil and harmful gases, the electronic components of the best hidden gps tracker for car gradually age and the accuracy decreases. Electronic best hidden gps tracker for car annual drift is generally around ±2%, or even higher. Under normal circumstances, the manufacturer will indicate that the effective use time of 1 calibration is 1 year or 2 years, and the expiration needs to be re-calibrated.
4. Select the best hidden gps tracker for car
best hidden gps tracker for car is non-sealed. To protect the accuracy and stability of the measurement, it should be avoided in acidic, alkaline and organic solvent atmospheres. Also avoid use in dusty environments.
In order to correctly reflect the humidity of the space to be measured, it is also necessary to avoid placing the sensor too close to the wall or in a dead corner where the air does not flow. If the room being tested is too large, multiple detection devices should be placed.
Some of the best hidden gps tracker for car have high requirements for power supply, otherwise the measurement accuracy will be affected. Or the sensors interfere with each other and don't even work. When used, the power supply should be provided in accordance with the technical requirements and meet the accuracy requirements.
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