Wet bulb black bulb temperature index meter Thermal index meter model:HAD-T3009

Completely in accordance with the "Classification Standards for High Temperature Operations"Design and production in accordance with the requirements of GB/T4200-2008. We have achieved simultaneous detection and display of temperature, as well as three sets of WBGT values, instantaneous average values, and time period average values for nine sensors (dry ball, wet ball, black ball) in three groups (head, abdomen, ankle). And humidity detection sensors have also been added to better meet the needs of our customers.

Structure of the instrument

　　HAD-T3009The wet bulb black bulb temperature index instrument mainly consists of three sets of measuring heads and the instrument host, with a total of four parts. Wireless data communication is used between the host and the probe, without the need for any additional wiring connections. Eliminating the hassle of connecting wires. In the absence of obstacles, the wireless data transmission distance isEffective within a range of 2-40 meters.

　　1. About the probe

　　The natural wet bulb temperature measuring head cover has a layer of gauze and is placed in the measured environment, relying entirely on natural ventilation. Therefore, the obtained reading is different from the count of the ventilated dry bulb thermometer. It has the following characteristics:

measure head form Shape: cylindrical shape

measure head outside Diameter:6±1mm

Minimum length of measuring head:30 ± 5mm

measure measure Fan Surrounding:5-40 ℃ Accuracy: ± 0.5 ℃

There is a water cup at the bottom of the measuring head. When using, fill the cup with water. The measuring head should be wrapped with a highly absorbent material, such as cotton gauze. The gauze should be packaged in a tubular shape, with a size that fits perfectly on the measuring head. If it is too tight or too loose, it will affect the reading of the measuring head. The gauze should be kept clean. The lower end of the gauze should hang in a water tank, and the free length of the gauze in the air should not be less than30-35mm. It should be able to prevent the increase in water temperature caused by radiation heat. Any other type of device can be used if the same data can be obtained after calibration.

　　⑵ Black ball temperature probe

The temperature sensitive element of the black ball temperature probe is placed at the center of the black ball, and the characteristics of the black ball are:

Straight Diameter:150mm

Average radiation coefficient:0.95 (unpolished black ball);

Thick Degree: The thinner the better;

Testing measure Fan Surrounding:20-120℃；

Accurate true Degree:± 0.5 ℃ at 20-50 ℃ ± 1 ℃ at 50-120 ℃

　　⑶ Air temperature probe

Attention should be paid to preventing the sensitive components of air temperature from being affected by radiation heat during measurement.

Measurement range:10-60℃；

Accurate true Degree:± 0.5 ℃.

To ensure the accuracy and stability of the test, the temperature sensitive element used in this instrument is a digital temperature sensitive element.

⑷ Humidity sensor probe:

Humidity measurement range:20%-95%（0 linear measure-50 Humidity measurement error within the temperature range:5%.

2. Hair measuring device

The function of the hair detector is to wirelessly send the data detected by the head detector to the host. There are three transmitters, namely the head detector, abdominal detector, and ankle detector.

3. Instrument host

HAD-T3009The type index meter adopts digital temperature sensitive components and a large screen320 × 240 dot matrix LCD display screen. Directly output digital temperature signals to display the dry bulb, wet bulb, and black bulb temperatures of the head, abdomen, and ankle on the screen, as well as the current WBGT index values. The backlight of the host will automatically turn off after 4 minutes of no button operation. At this time, press any key to restore the backlight.

The instrument host, in addition to the LCD display screen on the panel, has the power switch, power indicator light, undervoltage index light, and other components located below the front panel from left to rightThere are six buttons: "Exit", "Up", "Down", "Left", "Right", and "Confirm".