*USED* PAR Meter Light Intensity Testing

$334.99 $150.00

Gently Used PAR Meter (works great!) – $150

The probe is water proof so you can measure the light inside your tank (the display is not water proof).

When to use a PAR meter:

  • Upgrading a lighting system (ex. fluorescent lighting to LED lighting)
  • Replacing your old light bulbs with new bulbs (new bulbs are always brighter)
  • It’s recommended to measure PAR semi-annually for LED’s and more frequently for other bulb types as lights will start to lose power over time



This item is sold “as is” and we will test the item in front of you to show that it’s in working order. We will not, under any circumstance, sell non-functioning, broken or leaky items without clearly stating this in the description. Unless otherwise stated, we don’t know the age of used bulbs or equipment. We encourage you to thoroughly inspect items as we are not responsible for injuries or property damage incurred by the purchaser or end user.


In stock

Product Description

PAR Meter (Quantum Separate Sensor with Handheld Meter)

Apogee Instruments quantum sensors measure photosynthetically active radiation (PAR). The MQ-200 features a handheld meter to display and store measurements with a separate sensor head connected by a lead. The sensor head features a fully potted, domed-shaped design making it fully waterproof, weatherproof and self-cleaning. The head can be held by hand, mounted to a leveling plate, or attached to an optional sensor wand for taking measurements in hard to reach places. Photosynthetically active radiation (PAR), or photosynthetic photon flux (PPF), is the spectral range (wave band) of solar radiation from 400 to 700 nanometers that photosynthetic organisms are able to use in the process of photosynthesis. Gardeners, greenhouse managers, growth chamber users and salt-water aquarists measure PAR to ensure optimal specimen health.

Manufacturer Specifications

Calibration Uncertainty: ± 5 %
Measurement Repeatability: < 1 %
Non-stability (Long-term Drift): < 2 % per year
Non-linearity: < 1 % (up to 3000 µmol m-2 s-1 )
Response Time: < 1 ms
Field of View: 180°
Spectral Range: 410 nm to 655 nm (wavelengths where response is greater than 50 % of maximum)
Directional (Cosine) Response: 0.06 ± 0.06 % per C
Temperature Response: ± 5 % at 75° zenith angle
Operating Environment: 0 to 50 C, < 90 % non-condensing relative humidity up to 30 C, < 70 % non-condensing relative humidity from 30 to 50 C, Separate sensors can be submerged in water up to depths of 30 m
Meter Dimensions: 12.6 cm length, 7.0 cm width, 2.4 cm height
Sensor Dimensions: 2.4 cm diameter and 2.8 cm height
Mass: 180 g
Cable: 2 m of shielded, twisted-pair wire. Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)
Warranty: 4 years


General PAR Numbers For Corals^

^ Lighting guidelines are general and depends heavily on the type of light, quantity of bulbs, distance off water, depth of tank and age of bulbs
  • Low Light -Mushrooms, Zooanthids, Soft corals
    • PAR = 50-100
    • Lights: Compact Fluorescent, T5 Lighting
  • Medium Light – LPS, Clams, Some SPS
    • PAR = 100-200
    • Lights: T5 High Output Lighting, LED, Metal Halide
  • High Light – Acropora, Montipora, SPS
    • PAR = 200-500
    • Lights: LED’s, Metal Halide
  • Very High Light – Very Few SPS
    • PAR = 600-1000
    • Lights: LED’s, Metal Halide

Owner’s Manual: PDF
Specifications Sheet: PDF
Manufacturer Website: Aquarium PAR Meters


Additional Information

Weight 1 lbs
Dimensions 8.8 x 7.8 x 1.8 in