Maxibright PAR Metre

Product detailed description

Maxibright Quantum PAR Metre: measure how much light plants are really receiving

The PAR metre is a measuring instrument for growers who want to know the actual light intensity in their grow tent instead of relying on catalogue figures. The quantum sensor measures PAR and PPFD – that is, photosynthetically usable light reaching the plants – across a range of 0 to 3999 µmol/m²/s with repeatability of +/-1 µmol/m²/s. The MBPAR01 model measures independently of the light fitting manufacturer, so you can compare different lamps on the same basis and verify whether the stated output matches reality.

What is a PAR metre useful for?

Without measurement, you are estimating – with a PAR metre, you know. You can find out whether plants at the edges of the grow tent are receiving enough light, at what height to hang the light fitting, where dark areas occur and when it makes sense to increase or reduce the output. You can verify manufacturers’ PPFD maps and fine-tune the lighting conditions precisely according to the growth stage. With more expensive light fittings, the instrument pays for itself by helping you get the maximum from them without burning plants through excessive light.

Parameters

• Type: quantum PAR/PPFD metre (model MBPAR01)
• Measuring range: 0-3999 µmol/m²/s
• Repeatability: +/-1 µmol/m²/s
• Display: large LCD
• Sensor: separate, with a 1/4" thread for a tripod
• Cables: straight and coiled for connecting the sensor
• Functions: zeroing, value recording, factory reset
• Power supply: AAA batteries
• Included: metre, sensor, both cables, AAA batteries, instructions

Is investing in a PAR metre worthwhile?

A PAR metre is a one-off investment that pays off with every subsequent light fitting and every grow tent adjustment. Instead of guessing based on marketing figures, you measure real values and make decisions accordingly – where to hang the lamp, how to set the dimming, and whether the light fitting you bought really performs as promised. Mounting the sensor on a tripod with a 1/4" thread and both supplied cables make it easier to take precise measurements at any point across the area. You can find more light metres in the Light Metres section.

Frequently asked questions

What does a PAR metre measure and in which units?

A PAR metre measures PPFD, meaning the photon flux density of photosynthetically active radiation reaching an area, in µmol/m²/s. This is the light that plants actually use for photosynthesis. The MBPAR01 model handles a range of 0 to 3999 µmol/m²/s with repeatability of +/-1 µmol/m²/s, covering both low and very intense grow lighting.

Can the PAR metre measure light from any light fitting?

Yes. The quantum sensor measures incoming PAR independently of the type and brand of the source, allowing you to compare LED panels, discharge lamps and daylight on the same basis. This is its main benefit: the figures are not influenced by the lamp manufacturer’s marketing. You can measure the real intensity at a specific point in the grow tent and adjust the height or output of the light fitting accordingly.

How do you use a PAR metre to set up a light fitting?

Position the sensor at the height of the plant tops, ideally on a tripod with a 1/4" thread, and read the value on the display. Measure several points across the area – the centre and corners – to find out where there is enough light and where it is lacking. Then adjust the hanging height or dimming level according to the measured µmol/m²/s. The value-recording function makes it easier to compare multiple locations.