- Stock:
- Model: KW-360 Mini
Description
This Ultrasonic Anemometer has no moving mechanical parts so no bearings to seize. It works by simultaneously measuring the 2-dimensional horizontal components of the wind speed and direction based on principle of TOF (time of flight) of ultrasonic sound wave.
The anemometer is made in moulded thermoplastic (ASA) which has high outdoor weather ability. ASA is extremely resistant against UV radiation and is frost and heat resistant. The product is widely used in other outdoor applications. Sending its data by NMEA0183, it can be sent to an MFD chart plotter to give wind speed and direction both true and apparent. If using an Onwa plotter on its wind screen, the image and read out of wind speed, and angle is easily seen.
. Dedicated wind display, available on all Onwa chart plotters
Reasons to buy this product:
- No moving or wearing parts
- Wind speed and direction - both true and apparent
- Anti-corrosion
- No inertia problem
- Sensitive and prompt response
- Easy installation
- No need to re-calibrate
- No dead band 0-359°
- Communicate with other NMEA0183 equipment via RS232 or RS485 protocols, easy connection to a chart plotter or NMEA0183 repeater
Measure the transmission time of ultrasonic sensors from sensor N to sensor S, and compare it with the transmission time of sensor S to sensor N. Similarly, compare the time of W to E and E to W time. (N = north, S = south, E = east, W = west). For example, if the wind blew from the north, time of ultrasonic from N to S will be shorter than from S to N, and transmission time of it from W to E and E to W is the same. Through calculating the time difference of ultrasonic transmission between two points, the wind speed and direction can be calculated. This calculation method has nothing to do with other factors such as temperature.
The supplied cable is only 4 metres which clearly is inadequate if mounting at height, on a mast, for example. A longer cable can be made up to accommodate this requirement.
For professional users there is a version which has additional features including weather monitoring software and weather alarms.
