AH-200 PAR / CO₂ / Temp / Humidity Data Logger
A four-sensor handheld meter for grow tents and greenhouses. Measure plant light, CO₂, air temperature and relative humidity in one place, and log conditions while you dial in your environment.
Four environmental sensors in one meter
See light and air conditions together so you can match PAR, CO₂, temperature, and humidity to each growth stage.
PAR sensor for plant light
Dedicated PAR sensor for photosynthetic light in the 400–700 nm band, ideal for adjusting LED and HPS fixtures in grow tents and rooms.
CO₂, temperature & humidity
Built-in air-quality module tracks CO₂ alongside air temperature and relative humidity, so you can keep VPD and CO₂ in the target window.
Handheld logger
Log changing conditions while lights cycle or when fans turn on. Use min/max readings and trends to troubleshoot hotspots and dead zones.
How growers use AH-200
1) Place sensors where plants live
Hang the PAR sensor near the canopy and position the main unit at plant height where CO₂, temperature and humidity represent what the crop actually feels.
2) Watch the live values
Use the backlit display to read PAR, CO₂, temperature and RH at a glance. Check during lights-on and lights-off to understand your full daily cycle.
3) Adjust and verify
Change light height, dimming, ventilation or CO₂ injection and confirm the new readings. Repeat until the room stays inside your target ranges.
Key specifications
- Measured parameters
- PAR (photosynthetic light), CO₂, air temperature, relative humidity.
- PAR band
- Plant-lighting PAR in the 400–700 nm range, suitable for LED, HPS and CMH fixtures.
- Display
- Backlit LCD showing all channels, designed for use inside grow tents and rooms.
- Form factor
- Handheld main unit with external sensor leads for flexible placement.
- Typical environments
- Indoor grow tents, greenhouses, grow rooms and environmental test spaces.
- Model
- AH-200 (PAR / CO₂ / Temp / Humidity Data Logger)
Exact numerical ranges and tolerances may change with firmware or production updates. Always refer to the Amazon product listing and included manual for the latest detailed specifications.
What it helps you see
Use AH-200 when you want to see the whole picture, not just a single sensor.
Built for indoor growers
Grow tents & hobby rooms
See if your PAR and CO₂ targets are actually reached at canopy height, and find corners that are too dim or under-ventilated.
Greenhouses
Track how natural light, supplemental lighting and ventilation work together. Use readings to adjust shading, fan speed, or CO₂ supplementation.
Commercial facilities
Give your team a quick diagnostic tool for new rooms, fixture changes, or troubleshooting yield differences between zones.
FAQ
Is AH-200 only for professional growers?
Can I use it just as a PAR meter?
Does it replace a full environmental controller?
Where can I find detailed accuracy and range specs?
Ready to see your grow room clearly?
One handheld meter for PAR, CO₂, temperature and humidity – so you can match your environment to what your plants need.