Product Overview
The BTMETER BT-881W is a versatile digital instrument designed to measure various environmental parameters, including wind speed, ambient temperature, humidity, and Wet Bulb Globe Temperature (WBGT). It serves as both a digital anemometer and a heat stress monitor, suitable for indoor and outdoor applications.

Figure 1: BTMETER BT-881W Heat Stress Meter Anemometer with its primary functions: Wind Speed, Wind Temperature, WBGT Temperature, Humidity, WBGT Alarms, and 5 Wind Speed Units.
Ključne karakteristike:
- Multifunkcionalno mjerenje: Measures wind speed, ambient temperature, humidity, and WBGT.
- visoka preciznost: Features upgraded wind and temperature sensors for precise readings.
- WBGT Monitoring: Includes WBGT alarms and supports indoor/outdoor WBGT measurement modes.
- Prilagođeno korisniku: Offers 5 air velocity units, 2 temperature units, data hold, backlit LCD, and auto power-off.
- Mogućnost montaže na stativ: Equipped with a 1/4" screw hole for tripod installation.
Setup
Instalacija baterije:
The BT-881W requires one 9V battery (not included). To install the battery:
- Pronađite poklopac odjeljka za bateriju na stražnjoj strani uređaja.
- Otvorite poklopac.
- Umetnite bateriju od 9 V, pazeći na ispravan polaritet.
- Čvrsto zatvorite poklopac odeljka za baterije.
Montaža na stativ (opciono):
For stable measurements, the device can be mounted on a tripod. A 1/4" screw hole is located at the bottom of the unit.
- Locate the 1/4" screw hole at the base of the meter.
- Align the meter with your tripod's mounting screw.
- Gently twist the meter onto the tripod until it is secure.

Slika 2: Pozadi view of the BT-881W showing the battery compartment and dimensions.
Uputstvo za upotrebu
Uključivanje/isključivanje:
- Pritisnite Snaga dugme za uključivanje uređaja.
- Uređaj ima funkciju automatskog isključivanja kako bi se uštedjelo trajanje baterije.
Mode Switching (Wind Speed / WBGT):
Pritisnite MODE button to switch between wind speed measurement and WBGT (Wet Bulb Globe Temperature) measurement.
Wind Speed Unit Selection:
In wind speed mode, press the VJETAR button to cycle through the 5 available air velocity units: m/s, Ft/min, Knots, Km/h, Mph.

Figure 3: Display showing various wind speed units and the tripod mounting option.
Temperature Unit Switching (°C / °F):
Pritisnite ° C / ° F dugme za prebacivanje između Celzijusovih i Fahrenheitovih temperaturnih jedinica.
Indoor/Outdoor WBGT Mode:
In WBGT display mode, press the OUT / IN button to switch between indoor and outdoor WBGT measurement modes. This helps account for differences in temperature, humidity, and direct or radiant sunlight.
Funkcija zadržavanja podataka:
Pritisnite MAX/MIN button briefly to activate the data hold function, which freezes the current measurement on the display. Press again to release.
WBGT Alarm Settings:
The device can alert you when the black globe temperature (TG) level reaches a set threshold (20~50°C).
- Pritisnite SET dugme za ulazak u režim podešavanja alarma.
- Koristite dugmad sa strelicama (▲ / ▼) to adjust the alarm temperature value.
- When WBGT alarms are triggered, the backlight color changes to red.

Figure 4: WBGT alarm levels and corresponding temperature ranges (Caution, Extreme Caution, Danger, Extreme Danger).
Video demonstracija:
Video 1: Official BTMETER 881W Heat Stress Meter Anemometer demonstration, covering unboxing, basic operation, and feature highlights.
Održavanje
- Održavajte uređaj čistim i suhim. Koristite meku, damp krpu za čišćenje; ne koristite abrazivna sredstva za čišćenje ili rastvarače.
- Store the device in its protective pouch when not in use to prevent damage.
- Izvadite bateriju ako uređaj nećete koristiti duži period kako biste spriječili curenje baterije.
- Izbjegavajte izlaganje uređaja ekstremnim temperaturama, direktnoj sunčevoj svjetlosti ili visokoj vlažnosti.
Rješavanje problema
If you encounter issues with your BTMETER BT-881W, consider the following common troubleshooting steps:
- Uređaj se ne uključuje: Provjerite je li 9V baterija ispravno instalirana i dovoljno napunjena. Zamijenite bateriju ako je potrebno.
- Netačna očitanja: Ensure the sensors are clean and unobstructed. Allow the device to equilibrate to the environment for several minutes, especially for WBGT measurements.
- Problemi sa prikazom: If the display is dim or flickering, replace the battery.
- WBGT alarm not working: Verify that the alarm temperature is set correctly in WBGT mode.
Za dodatnu pomoć, molimo pogledajte odjeljak Podrška.
Specifikacije
| Broj modela | BT-881W |
| Dimenzije proizvoda | 2.05 x 1.57 x 8.19 inča (5.2 x 4.0 x 20.8 cm) |
| Težina artikla | 4.96 unce (0.31 funte) |
| Izvor napajanja | Battery Powered (1 x 9V battery required, not included) |
| Display Type | LCD |
| Senzorna tehnologija | Ultrasonic |
| Raspon brzine vjetra | 0~30 m/s |
| Raspon temperature okoline | 0 ~ 50 ° C (32 ~ 122 ° F) |
| Preciznost temperature | ±0.6°C (±2°C overall) |
| Raspon vlažnosti | 0.1%~99.9% RH |
| WBGT Temperature Range | 32~122°F (Celsius/Fahrenheit Switchable) |
| Vrsta materijala | Plastika |
| Uključene komponente | 1*Heat Stress Meter, 1* User manual |
Garancija i podrška
Informacije o garanciji:
The BTMETER BT-881W comes with a 1-godišnja garancija proizvođača. All BTMETER electrical products are strictly calibrated before shipment.
tehnička podrška:
BTMETER provides lifetime technical support for this product. For any technical inquiries, troubleshooting assistance, or warranty claims, please contact BTMETER customer service directly. Refer to the contact information provided with your purchase or visit the official BTMETER webstranica za detalje o podršci.