When you need environmental indoor air measurement, the first question isn't just "which meter?" It's "what am I actually measuring?" Air flow, light, and sound are just a few of the measurement types you might need. The four options here cover different jobs, from a compact all-in-one environmental meter to a professional handheld weather station to a dedicated DO meter.
Quick take
The easiest way to choose is to decide which role you need filled: a broad indoor sampler, a dedicated DO meter, or a professional weather-style handheld. The Multi-Function Environmental Meter fits the first role, the Environmental Express DO 100 fits the second, and the Kestrel 5200 fills the third. Prices span from $85.99 to $309 across the four versions.
Listed Price Comparison
| Product | Listed Price | Price Bar | Primary Strengths |
| Multi-Function Environmental Meter: Anemometer, Sound, Air Flow, Humidity & LUX | $85.99 | | Air velocity, sound, humidity, light |
| Environmental Express DO 100 Portable DO Meter / NO PROBE | $183.34 | | Dissolved oxygen (probe not included) |
| Kestrel 5200 0852HVG Professional Environmental Meter | $309.00 | | Temperature, wind speed, barometer, humidity |
| Kestrel 5200 Professional Environmental Meter | $309.00 | | Temperature, wind speed, barometer, humidity |
Decision Matrix
| Your main focus | Choose | Why |
| Broad indoor checks with one handheld | Multi-Function Environmental Meter | Covers several common readings in one unit |
| Water-quality testing | Environmental Express DO 100 | Dedicated DO meter; remember the probe is not included |
| Job-site weather readings | Kestrel 5200 (either version) | Handheld design with advanced calculators |
Product Notes
Multi-Function Environmental Meter: Anemometer, Sound, Air Flow, Humidity & LUX
The Multi-Function Environmental Meter combines five common indoor checks into a single black handheld with an ABS plastic body. A tripod mount and large dual LCD let you monitor two readings at once, and the built-in digital sensor sits alongside a low-friction vane wheel for air velocity measurements. The meter also uses a precision photo diode for light readings and can display sound level. As a 5-in-1 meter, it sticks to air velocity, sound, humidity, and light; it won't cover dissolved oxygen or barometric pressure.
Environmental Express DO 100 Portable DO Meter / NO PROBE
This meter is for a very specific job: measuring dissolved oxygen. It comes as a new open-box unit, never used or deployed, with the display, buttons, and housing in pristine condition and waterproof and dust-resistant integrity preserved. A set of three AA batteries is included. The original probe is not included, so you will need a compatible DO 100 probe before you can take readings. For field studies, wastewater monitoring, or environmental sampling, this is the only product in this group that starts from a dissolved oxygen workflow.
Kestrel 5200 0852HVG Professional Environmental Meter
This handheld Kestrel measures temperature, wind speed, barometric pressure, and humidity, and it steps beyond simple readings with advanced calculators for tasks like concrete pouring and HVAC balancing. It also logs over 10,000 sets of time-stamped data, so you can review how conditions changed during a job. The green handheld includes a digital LCD, a data logger, and outdoor-use capability. To move logged data to a computer, you'll need the waterproof USB transfer cable, which is available separately.
Kestrel 5200 Professional Environmental Meter
This second Kestrel 5200 version is configured without LiNK, but the meter can work with the LiNK wireless communication option and Kestrel LiNK app for mobile data transfer. It offers the same advanced calculators, time-stamped logging, and job-site measurements as the other Kestrel. If wireless transfer matters, you'll need to add LiNK separately; if you're fine with the without-LiNK setup, this version gives you the same core Kestrel 5200 capability. It is a practical option when you want the Kestrel 5200 feature set but plan to handle data transfer your own way.
Final Recommendation by Use Case
Choose the Multi-Function Environmental Meter when you want one simple handheld for general indoor checks. Choose the Environmental Express DO 100 when your work centers on water-quality testing; just plan for a compatible probe. Choose either Kestrel 5200 version when you need professional weather calculations. The two Kestrel versions share the same core meter; pick the one whose accessory approach matches how you want to move data.
