VDL PAR Meter Monitor

Real light control for better growing

If you don’t know how much light actually reaches your plants, you’re growing blind. The VDL PAR Meter Monitor measures Photosynthetic Photon Flux Density (PPFD), expressed in µmol/m²/s, the key parameter directly linked to photosynthesis and plant development.

Unlike watts or lumens, PPFD tells you exactly how much usable light your plants receive, allowing precise lighting decisions based on facts, not assumptions.

Ideal for LED and also highly effective with HPS

Although commonly associated with LED setups, this meter is especially useful in HPS grows, where uneven light distribution is very common:

- Excessive light directly under fixtures
- Light drops between lamps
- Shadowed areas causing uneven plant growth

With the VDL PAR Meter, you can measure both under and between fixtures, identify shadows, and adjust lamp height or spacing to achieve a more uniform and productive canopy.

Designed for practical, everyday use

Thanks to its compact size and lightweight design, this meter allows quick and accurate measurements without bulky equipment. Ideal for grow tents, grow rooms and technical horticulture applications.

Perfect for:

✅ Adjusting fixture height
✅ Optimizing LED layouts
✅ Improving canopy uniformity
✅ Increasing yield with existing equipment

What it measures

The VDL PAR Meter measures PPFD in the 400–700 nm range, the photosynthetically active radiation spectrum plants use to convert light into energy.

Better PPFD control means healthier plants, more efficient photosynthesis and improved harvests.

Technical Specifications

- Measurement range: 0–3999 µmol/m²/s

- Accuracy: ±1 µmol/m²/s

- Resolution:
0.1 µmol/m²/s (0–999)
1 µmol/m²/s (1000–3999)

- Spectral range: 400–700 nm

- Operating temperature: 0 °C to 50 °C

- Power supply: 2 × AAA batteries

- Main unit dimensions: 115 × 60 × 24 mm

- Sensor unit dimensions: 80 × 45.6 × 26 mm

- Weight: 115 g (without batteries)