https://www.ysi.com/products/sampling-handhelds
Water Quality Sampling Portable Handheld Meters, DO Meters
Water sampling handheld meters, field durable portable instruments and multiparameter sensors for measurement and collection of water quality data. YSI...
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https://www.aisa.co.za/product-category/gas-analysers/co2/
CO2 Meters, Transmitters, Dataloggers and Handheld Insturments
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https://tempest.earth/wind-weather-meters/
Handheld Wind and Weather Meters | WeatherFlow
Mar 25, 2026 - Highly accurate handheld weather meters used with your smartphone to measure wind, temperature, humidity and pressure readings.
wind and weatherhandheldmetersweatherflow