Showing all 117 results

GAOTek Abnormal Motion Sensor

SKU: GAOTek-IOTS-114
This Abnormal Motion Sensor has a temperature range of -40 °F to 185 °F, measurement range of 0° to 180° and 3.6 V Lithium battery.

GAOTek Air Quality Sensor

SKU: GAOTek-IOTS-146
GAOTek air quality sensor is equipped with a premium sensor, which can quickly and sensitively detect CO2 concentration, temperature, and humidity in daily life.

GAOTek Alarm Wind Speed Sensor

SKU: GAOTek-IOTS-173
GAOTek alarm wind speed sensor is a device for measuring wind speed and wind force in construction machinery (cranes, crawler cranes, portal cranes, tower cranes etc.)

GAOTek Anti-Theft Alarm Sensor

SKU: GAOTek-IS-108
GAOTek Anti-Theft Alarm Sensor is a cutting-edge solution for asset security.

GAOTek Camera Sensor

SKU: GAOTek-IS-102
The GAOTek Camera Sensor offers advanced imaging capabilities in a compact form factor.

GAOTek Carbon Monoxide Detector Sensor

SKU: GAOTek-MOA-128
GAOTek carbon monoxide detector sensor integrates eight meteorological parameters, Ambient Temperature, Relative Humidity, Atmospheric Pressure, Wind Speed, Wind Direction, Noise, PM2.5 and PM10, in one structure.

GAOTek COD Sensor

SKU: GAOTek-MOA-100
GAOTek COD sensor is a new generation of environmentally friendly COD/TOC sensor launched by our company.

GAOTek Dimmer IoT Devices sensor

SKU: GAOTek-IoTS-110
GAOTek dimmer IoT devices sensor offers powerful functions, easy implementation, wiring-free, reliable operation, and easy maintenance.

GAOTek Electrode PH Sensor

SKU: GAOTek-IOTS-144
GAOTek electrode pH sensor is a high-quality sensor for the analysis and measurement of liquid components during industrial automation.

GAOTek Home Smoke Detector Sensor

SKU: GAOTek-IOTS-148
GAOTek home smoke detector sensor is a 9V battery smoke detector, hereinafter called detector.

GAOTek Household Water Leak Sensor

SKU: GAOTek-IOTS-119
GAOTek household water leak sensor adopts advanced wireless transmission technology and can be used with the alarm host.

GAOTek Humidity and Temperature Sensor

SKU: GAOTek-IOTS-179
GAOTek humidity and temperature sensor is a high-precision digital temperature and humidity indicator with BLE 5.0 technology.

GAOTek Illumination Sensor

SKU: GAOTek-IOTS-177
GAOTek illumination sensor adopts advanced circuit module technology development transmitter, and metal shell.

GAOTek Illumination Temperature Humidity Sensor

SKU: GAOTek-IOTS-178
GAOTek illumination temperature humidity sensor detects the temperature, humidity, illuminance in the current environment and outputs the line in 485 ways.

GAOTek Infrared Motion Sensor

SKU: GAOTek-IOTS-099
This Infrared motion sensor has an unparalleled level of convenience, allowing you to control and monitor your living space effortlessly.

GAOTek Infrared Motion Sensor

SKU: GAOTek-IOTS-210
This Infrared motion sensor has an unparalleled level of convenience, allowing you to control and monitor your living space effortlessly.

GAOTek IoT Flow Sensor

SKU: GAOTek-MOA-212
GAOTek IoT Flow Sensor is a cutting-edge device designed for remote flow monitoring.

GAOTek IoT Gateway Sensor

SKU: GAOTek-IOTS-091
GAOTek IoT gateway sensor is a comprehensive offering that serves as a pivotal component in enabling efficient, long-range, low-power communication for a wide range of IoT applications.

GAOTek IoT Humidity And Temperature Sensor

SKU: GAOTek-IOTS-093
GAOTek IoT humidity and temperature sensor is a wireless data transmission terminal designed for humidity and temperature monitoring.

GAOTek IoT Inline Non-Glass PH Sensor

SKU: GAOTek-IOTS-138
This IoT Inline Non-Glass pH Sensor has 0 pH to 14 pH measurement range, 1 % FS Current accuracy and 0.01 pH Resolution.

GAOTek IoT Light Sensor

SKU: GAOTek-IoTS-109
This Iot Temperature Humidity Controller Sensor has sensor range of 4 mA to 20 mA, voltage range of 5 V DC to 20 V DC and 10 dBm RF power.

GAOTek IoT Liquid Level Sensor For Diesel Fuel Measurement

SKU: GAOTek-IOTS-154
GAOTek IoT liquid level sensor is a wireless pressure-based sensor with 0.5% accuracy and up to 8.20 ft measurement range.

GAOTek IoT Lora WAN Smart Parking Sensor

SKU: GAOTek-IOTS-152
GAOTek IoT lora WAN smart parking sensors are wireless vehicle detection sensors for indoor and outdoor parking.

GAOTek IoT Outdoor Environment Sensor

SKU: GAOTek-IOTS-134
GAOTek IoT outdoor environment sensor is a Lora WAN sensor designed for different professional applications.

GAOTek IoT People Counting Sensor For Indoor Workplaces

SKU: GAOTek-IOTS-133
GAOTek IoT people counting sensor for Indoor Workplaces, based on Artificial Intelligence technology, is an AI workplace sensor designed to monitor occupancy and utilization in modern workspaces.

GAOTek IoT Self-Cleaning Water Conductivity Sensor

SKU: GAOTek-IOTS-132
This IoT Self-Cleaning Water Conductivity Sensor has ± 1 % F. S TDS with EC Accuracy, 32.18 °F Reproducibility and ≤ 0.74 lb Weight.

GAOTek IoT Sensor Gateway

SKU: GAOTek-IOTS-159
This IoT Sensor Gateway has humidity range 10 % to 90 %, temperature range of 14 °F to 140 °F and IP 22 IP rating.

GAOTek IoT Sensor Node

SKU: GAOTek-IOTS-151
This IoT Sensor node has power supply of 5100 mAh battery, battery lifetime of 5 Years and 12 V output switches.

GAOTek IoT Sensors For Analog Input

SKU: GAOTek-IOTS-156
GAOTek IoT sensors with analog input are ultra-low power, small size, and easy to operate.

GAOTek IoT Software Sound Sensor

SKU: GAOTek-IoTS-101
This IoT Software Sound Sensor has measuring range of 23 kHz to 51.6 kHz, humidity of < 95 % RH and 6800 mAh battery.

GAOTek IoT Soil EC Sensor

SKU: GAOTek-IOTS-139
This IoT Soil EC Sensor has measurement range of 0 us / cm to 10000 us / cm, temperature range of 40 °F to 176 °F and ≤0.4 W power consumption.

GAOTek Iot Temperature Humidity Controller Sensor

SKU: GAOTek-IoTS-106
This Iot Temperature Humidity Controller Sensor has humidity range of 5 % RH to 95 % RH, 10 s to 6000 s of transmit Interval and DC 12 V Power Supply.

GAOTek IoT Transmitter Sensor

SKU: GAOTek-IoTS-108
GAOTek IoT transmitter sensor is a data transmission module that uses NB-IoT wireless communication to remotely monitor and collect sensor data.

GAOTek IoT Ultrasonic Liquid Level Transmitter Sensor

SKU: GAOTek-IoTS-102
GAOTek IoT ultrasonic liquid level transmitter sensor is a kind of non-contact, high-reliability, high cost-performance, easy-to-install and maintain material level measuring instrument.

GAOTek Iot ultrasonic sensor

SKU: GAOTek-IoTS-104
This Iot ultrasonic sensor has a sensing range of 13.7 in, 20 Hz switch frequency and 25 MS response time.

GAOTek IoT Water Conductivity Sensor For Smart Agriculture

SKU: GAOTek-IOTS-135
GAOTek IoT water conductivity sensor for smart agriculture is a high-performance sensor for measuring electrical conductivity in water.

GAOTek IoT Water Level Sound Sensor

SKU: GAOTek-IOTS-153
This IoT Water Level Sound Sensor has 23 dBm ±2 dB Transmition Power, – 115 dBm Receiving Sensitivity and 0.5 % FS Accuracy.

GAOTek IoT Water Quality Monitoring Sensor

SKU: GAOTek-IOTS-136
This IoT Water Quality Monitoring Sensor has a 0 pH to 14 pH range, ± 0.1 PH Accuracy and < 0.5 W Power consumption.

GAOTek IoT Water Quality Monitoring Sensor

SKU: GAOTek-IOTS-137
This IoT Water Quality Monitoring Sensor has – 1000 mV to 1000 mV Detection range, 1 mV sensitivity and ≤5 s response time.

GAOTek IoT Wi-Fi Sensor

SKU: GAOTek-IOTS-092
GAOTek IoT wi-fi sensor is a versatile and innovative solution that seamlessly connects sensors and beacons, enabling efficient data transmission and real-time monitoring.

GAOTek IoT Wireless Industrial Sensor

SKU: GAOTek-IoTS-105
GAOTek IoT wireless industrial sensor is a vibration monitoring system for preventive maintenance and simple diagnosis.

GAOTek IP67 3-Axis Acceleration Sensor

SKU: GAOTek-IS-103
GAOTek IP67 3-axis acceleration sensor offers cutting-edge technology in a timeless and elegant package.

GAOTek IR Tracking Inductance Sensor

SKU: GAOTek-IS-110
The GAOTek IR Tracking Inductance Sensor is a versatile and reliable device designed for a wide range of applications.

GAOTek Irrigation Sensor

SKU: GAOTek-MOA-213
GAOTek IoT Flow Sensor is a cutting-edge device designed for remote flow monitoring.

GAOTek Level Monitoring Sensor

SKU: GAOTek-IOTS-176
GAOTek level monitoring sensor is one kind of ultrasonic liquid level sensor, which can detect the LPG tank liquid level by outside bottom installation without drilling holes.

GAOTek Location Tracking Wristband

SKU: GAOTek-LT-105
The GAOTek location tracking wristband with Bluetooth is a reliable and innovative device designed to enhance child safety and peace of mind

GAOTek Long-Range IoT Sensor

SKU: GAOTek-IOTS-158
GAOTek long-range IoT sensor is a plug-and-play, low-power wireless temperature and humidity measuring device.

GAOTek Lora IoT Sensor for Livestock Tracking

SKU: GAOTek-IOTS-155
GAOTek lora IoT sensor for livestock tracking is a LoRa-based GPS collar with Li-SOCl2 battery.

GAOTek Metal Illumination Sensor

SKU: GAOTek-IOTS-145
GAOTek metal illumination sensor is very sensitive and can detect weak light, has a wide measuring range, high accuracy, good waterproof performance, easy to use, easy to install.

GAOTek Microwave Occupation Sensor

SKU: GAOTek-IOTS-124
This Microwave Occupation Sensor has a temperature range of 14 °F to 131 °F, frequency range of 5.8 Ghz to 75 Mhz and AC 240 V battery. 

GAOTek Motion Sensor

SKU: GAOTek-IOTS-128
This Motion Sensor has a temperature range of 14 °F to 131 °F, humidity of ≤95% RH and DC 3 V battery 

GAOTek Motion Sensor

SKU: GAOTek-MS-107
The GAOTek motion Sensor is an innovative and versatile device designed for a range of applications.

GAOTek MQTT IoT Sensor Terminal

SKU: GAOTek-IOTS-157
GAOTek MQTT IoT sensor terminal is a reliable and efficient way to connect IoT sensors and meters to a public NB-IoT network.

GAOTek Multi Point Sensor

SKU: GAOTek-MOA-220
GAOTek Multi-Point Sensor is a versatile device capable of measuring multiple parameters simultaneously.

GAOTek Multi-Connectivity IoT Sensor

SKU: GAOTek-IS-109
The GAOTek Multi-Connectivity IoT Sensor is a versatile device designed for a wide range of applications.

GAOTek Multi-Parameter IoT Water Quality Sensor

SKU: GAOTek-IOTS-131
GAOTek multi-parameter IoT water quality sensor for long-term online monitoring, measuring up to 7 parameters simultaneously, including temperature, depth, pH, ORP, conductivity, salinity, TDS, turbidity, DO, chlorophyll, blue-green algae, ammonia nitrogen, nitrate nitrogen, chloride ions, and fluoride ions.

GAOTek Multi-Parameter IoT Water Quality Sensor

GAOTek multi-parameter IoT water quality sensor for long-term online monitoring, measuring up to 7 parameters simultaneously, including temperature, depth, pH, ORP, conductivity, salinity, TDS, turbidity, DO, chlorophyll, blue-green algae, ammonia nitrogen, nitrate nitrogen, chloride ions, and fluoride ions.

GAOTek Multi-Parameter Water Analyzer Sensor

SKU: GAOTek-IOTS-171
This Multi-Parameter Water Analyzer Sensor has a temperature range of -4 °F to 140 °F, frequency range 5.8 GHz to ±75 MHz and AC 277 V battery.

GAOTek Multi-Parameter Water Quality Sensor

SKU: GAOTek-MOA-211
GAOTek Multi-parameter Water Quality Sensor is an advanced device designed for comprehensive water quality monitoring.

GAOTek Multi-Sensor IoT

SKU: GAOTek-IOTS-097
GAOTek multi-sensor IoT can monitor accurate temperature and humidity with its extreme low power consumption BLE chip and high-performance digital sensor chip.

GAOTek Multiparameter Water Sensor

SKU: GAOTek-MOA-215
GAOTek multiparameter water sensors are a family of high-performance sensors designed to measure multiple water quality parameters in a single unit.

GAOTek MultiParameter Water Sensors

SKU: GAOTek-MOA-121
GAOTek multiparameter water sensors are a family of high-performance sensors designed to measure multiple water quality parameters in a single unit.

GAOTek Nitrogen Sensor

SKU: GAOTek-MOA-130
GAOTek nitrogen sensor is a high-performance sensor designed to measure the concentration of nitrogen gas in a variety of applications, including industrial process control, environmental monitoring, and safety systems.

GAOTek Oil Pressure Sensor

SKU: GAOTek-MAO-147
GAOTek Oil Pressure Sensor ensures precise and reliable measurements.

GAOTek Optical Rain Sensor

SKU: GAOTek-IOTS-112
GAOTek optical rain sensor senses water hitting its outside surface using beams of infrared light.

GAOTek Piezoelectric Force Sensor

SKU: GAOTek-MAO-146
GAOTek Piezoelectric Force Sensor offers precise, high-sensitivity force measurements across a broad range.

GAOTek Pressure Sensor

SKU: GAOTek-MAO-140
GAOTek offers advanced pressure sensors designed for precise measurements in various industrial applications.

GAOTek Prevent Accident

SKU: GAOTek-IoTS-107
GAOTek prevent accidents IoT open sensor detector is an intelligent well cover monitoring system that uses NB-IoT narrowband Internet of Things communication technology to provide real-time monitoring of well covers.

GAOTek Printing IoT Adhesive Tag Sticker

SKU: GAOTek-IOTS-150
This printing IoT adhesive tag sticker has a read range of 0 ft to 26.2 ft, write range of 0 ft to 13.1 ft, and operating frequency range of 840 MHz to 960 MHz.

GAOTek Radar Sensor

SKU: GAOTek-IOTS-096
GAOTek Radar Sensor is a smart device detecting human motion, stillness, and micromotion.

GAOTek Salinity Sensor

SKU: GAOTek-MAO-101
GAOTek Salinity Sensor is Widely used in pipe cleaning of power plants and foodstuff, as well as chemical production highly polluted environment.

GAOTek Sewage Tank Level Sensor

SKU: GAOTek-IOTS-122
GAOTek sewage tank level sensor is based on the principle that the measured hydrostatic pressure and the height of the liquid is Proportional.

GAOTek Sewage Water Quality Monitoring Sensor

SKU: GAOTek-IOTS-111
This Sewage Water Quality Monitoring Sensor has a temperature range of 14 °F to 248 °F, measuring range of 0 mg / L to 1000 mg / L and 12 VDC battery.

GAOTek Small Induction Infrared Sensor

SKU: GAOTek-IS-106
The GAOTek Small Induction Infrared Sensor Box Wireless Small Induction is a versatile and compact device designed for various applications.

GAOTek Smart Beacon IoT Module

SKU: GAOTek-IOTS-098
This Smart Beacon IoT Module has frequency of 2.4 GHz, temperature range of 32 °F to 185 °F, BT version of 4.2 and distance range of 0 in to 50 in.

GAOTek Smart Iot Wireless Vibration Sensor

SKU: GAOTek-IoTS-103
This Smart Iot Wireless Vibration Sensor has a frequency range of 10 Hz to 1600 Hz, resolution of 32.18 °F and IP 66 protection level.

GAOTek Smart Manhole Sensor

SKU: GAOTek-IOTS-125
GAOTek smart manhole sensor is specially designed for the detection of well covers such as electrical and sewage system.

GAOTek Smart Smoke Detector Sensor

SKU: GAOTek-IOTS-127
GAOTek smart smoke detector sensor Optical sensing principle is adopted to accurately perceive smoke density at smouldering fire.

GAOTek Smart Temperature and Humidity Sensor

SKU: GAOTek-IOTS-117
GAOTek smart temperature and humidity sensor is a long range, Sensor.

GAOTek Smart Temperature Sensor

SKU: GAOTek-IOTS-123
GAOTek smart temperature sensor can help you monitor your premises environmental condition online.

GAOTek Soil Meter PH Tester Sensor

SKU: GAOTek-IOTS-126
GAOTek soil meter Ph tester sensor has high precision, fast response, and stable output.

GAOTek Soil Temperature and Moisture Sensor

SKU: GAOTek-IOTS-143
GAOTek soil and moisture sensor is a low-power LORA soil sensor.

GAOTek Soil Testing Sensor

SKU: GAOTek-AS-101
The GAOTek Soil Testing Sensor offers efficient and reliable soil analysis for a range of applications.

GAOTek Street Light Sensor

SKU: GAOTek-IOTS-180
GAOTek street light sensor offers powerful functions, easy implementation, wiring free, reliable operation and easy maintenance.

GAOTek Temperature Accelerometer Sensor

SKU: GAOTek-IOTS-094
This Temperature Accelerometer Sensor has frequency range of 2.3 GHz to 2.5 GHz, 128-bit data encryption and Transmit power range of -20 dBm to 4 dBm.

GAOTek Temperature and Electrical Conductivity Sensor

SKU: GAOTek-IOTS-141
GAOTek temperature and electrical conductivity sensor provides an external probe for receiving accurate and instantaneous information on soil moisture content, temperature, and salinity.

GAOTek Temperature and Electrical Conductivity Sensor

GAOTek temperature and electrical conductivity sensor provides an external probe for receiving accurate and instantaneous information on soil moisture content, temperature, and salinity.

GAOTek Temperature and Humidity IoT Sensor

SKU: GAOTek-IOTS-116
This Temperature and Humidity IoT sensor has a temperature range of -22 °F to 158 °F, humidity range of 0% to 100% and 4000 mAh battery.

GAOTek Temperature and Humidity Sensor

SKU: GAOTek-IOTS-118
GAOTek temperature and humidity sensor is a portable tag with temperature and humidity sensor and 3-axis accelerometer sensor.

GAOTek Temperature And Humidity Sensor

SKU: GAOTek-IOTS-129
GAOTek temperature and humidity sensor is an anti-disassembly Bluetooth beacon that can be used as an asset tag.

GAOTek Temperature and Humidity Tracker Sensor

SKU: GAOTek-IOTS-149
This Temperature and Humidity Tracker Sensor has a temperature range of -40 °F to 158 °F, humidity of ≤65% RH and 3.6 V 2600 mAh battery.

GAOTek Temperature and Vibration Sensor

SKU: GAOTek-IOTS-142
GAOTek temperature and vibration sensor is a high-performance, low power consumption, anti-interference composite vibration sensor.

GAOTek Temperature Sensor

SKU: GAOTek-MAO-145
GAOTek Temperature Sensor offers precise measurements across various ranges.

GAOTek Temperature Sensor

SKU: GAOTek-IOTS-130
GAOTek temperature sensor is a Bluetooth device. It uses a broadcasting protocol which is based on BLE (Blue tooth Low Energy).

GAOTek Temperature Sensor

SKU: GAOTek-IOTS-174
GAOTek temperature sensor offers temperature monitoring and GPS tracking systems which are cost effective, and cloud based for wireless end-to-end cold chain monitoring.

GAOTek Temperature-Humidity Sensor

SKU: GAOTek-IOTS-147
GAOTek temperature-humidity sensor is a BLE (Bluetooth Low Energy) Beacon with temperature and humidity sensor.

GAOTek Traffic Speed Radar Sensor

SKU: GAOTek-MOA-217
GAOTek Traffic Speed Radar Sensor is a high-performance device designed for monitoring vehicle speed and traffic flow.

GAOTek Transceiver Sensor

SKU: GAOTek-IOTS-115
GAOTek transceiver sensor has remote analog quantity and switch quantity acquisition module which can be used to collect the current, voltage, switch quantity, temperature, and other signals output by the sensor, which are mainly used for computer room monitoring, industrial control, or other distributed data collection.

GAOTek Turbidity Sensor

SKU: GAOTek-MOA-216
GAOTek Turbidity Sensor adopts 90° scattering light principle, RS485 interface and standard Modbus protocol.

GAOTek Ultrasonic Level Sensor

SKU: GAOTek-IOTS-175
GAOTek ultrasonic level sensor is an intelligent non-contact level measuring instrument.

GAOTek Ultrasonic Solid Sensor

SKU: GAOTek-IOTS-095
GAOTek ultrasonic solid sensor is a reliable, cost-effective level measurement tool that operates without direct contact with the material.

GAOTek UltraSonic Weather Sensor

SKU: GAOTek-MOA-127
GAOTek ultrasonic weather Sensor is designed by the standard of WMO (World of Meteorological Organization).

GAOTek Vibration Response Sensor

SKU: GAOTek-MOA-218
GAOTek Vibration Response Sensor is designed to measure and analyze the response of structures or equipment to vibration. It aids in assessing structural integrity, identifying potential issues, and ensuring equipment safety.

GAOTek Vibration Sensor

SKU: GAOTek-MOA-214
GAOTek Vibration Sensor is a specialized device designed to detect and measure vibrations in various applications.

GAOTek Vibration Sensor

SKU: GAOTek-IOTS-140
GAOTek vibration sensor is mainly designed for industrial, commercial, and general building vibration detection and control.

GAOTek Vibration Sensor

GAOTek vibration sensor is mainly designed for industrial, commercial, and general building vibration detection and control.

GAOTek Water Dissolved Oxygen Sensor

SKU: GAOTek-MOA-131
This Water Dissolved Oxygen Sensor has temperature range of 32 °F to 140 °F, stability less than 1%

GAOTek Water Level Sensor

SKU: GAOTek-MOA-110
GAOTek water level sensor is a high-performance sensor designed to measure the level of water in a variety of applications, including wells, boreholes, water pipes, and reservoirs.

GAOTek Water Level Sensor

SKU: GAOTek-IOTS-172
This Water Level Sensor has a temperature range of 32 °F to 122 °F, measurement range 7.87 in to 314.96 in and built-in lithium battery.

GAOTek Water Quality Tester Sensor

SKU: GAOTek-IOTS-121
This Water Quality Teater Sensor has a temperature range of -4 °F to 185 °F, measuring range of 0 mg / L to 20 mg / L and 12 V DC batteries. 

GAOTek Wearable Waterproof Accelerometer Sensor

SKU: GAOTek-IS-104
The GAOTek Wearable Waterproof Accelerometer Sensor is a versatile and rugged solution designed for various applications.

GAOTek Weather Temperature And Humidity Sensor

SKU: GAOTek-IOTS-120
This Weather Temperature and Humidity Sensor has a temperature range of -40 °F to 185 °F, humidity range of 0% to 100% RH and 1.8 VDC battery.

GAOTek Wind Direction Sensor

SKU: GAOTek-MOA-129
GAOTek wind direction Sensor is composed of several sensors to measure wind speed & direction based on ultrasonic sound wave travel time difference in air, it has optional temperature, humidity and pressure sensors.

GAOTek Wind Speed Direction Sensor

SKU: GAOTek-MAO-148
GAOTek nitrogen sensor is a high-performance sensor designed to measure the concentration of nitrogen gas in a variety of applications, including industrial process control, environmental monitoring, and safety systems.

GAOTek Wireless Temperature Sensor

SKU: GAOTek-IOTS-113
This Wireless Temperature sensor has a temperature range of -130 °F to 158 °F, humidity range of 0% to 99% and 3.6 V lithium battery.

GAOTek Wireless Vibration Sensor

SKU: GAOTek-MAO-142
GAOTek Wireless Vibration Sensor offers precise measurements and real-time data transmission.

GAOTek Wireless Wind Sensor

SKU: GAOTek-MOA-141
GAOTek Wireless Wind Sensor is a state-of-the-art device designed for accurate and real-time wind speed and direction measurements.