PQS1 Kipp & Zonen PAR Quantum Sensor
For measuring Photosynthetic Active Radiation
weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported

Overview

PQS 1 PAR Quantum sensor is developed for accurate measurement of PAR. It offers a response with an excellent match to the ideal PAR response. In addition the optical design of the diffuser offers optimized cosine correction. The instrument is designed for continuous outdoor or indoor installation. Perfect for studies of crop growth in green houses for example.

Both solar radiation and artificial light sources like for example high pressure sodium lamps are common sources of Photosynthetic Active Radiation. PQS 1’s sensitivity has been optimized to provide reliable and accurate measurements regardless of the PAR source. This is important for horticultural studies and plant physiology monitoring.

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Detailed Description

The mounting flange incorporates a bubble level and adjustment screws, for easy leveling. A threaded hole takes the accessory screw-in mounting rod for fitting to masts and poles.

Two PQS 1 sensors can easily be bolted back-to-back, and fitted with the mounting rod, to make a simple PAR albedometer.

Specifications

  • Spectral range: (400 to 700) ± 4 nm 
  • Sensitivity: 4 to 10 µV/µmol/m²·s 
  • Response time: < 1 µs 
  • Non-linearity: < 1 % 
  • Temperature dependence: < -0.1 %/ ºC 
  • Sensitivity change per year: < 2 % 
  • Directional Error (up to 80 °): < 3 % 
  • Impedance: 240 Ω 
  • Field of view: 180 ° 
  • Operating temperature: -30 to +70 °C
  • Cable Length: 16ft standard (user specified optional)
  • Warranty: 2 years

Compatibility

Mounting

The PQS1 includes a bubble level and adjusting leveling screws, which allow the sensor to be leveled without using a leveling base. The 015 Mounting Arm can be used to mount the sensor to a mast or the CM225 Solar Sensor Mounting Stand can be used to attach the sensor to a mast, crossarm, or pole (1.0-in. to 2.1-in. outer diameter). The CM225 consists of rectangular plate, mounting bracket, U-bolts, lock washers, and nuts.

Alternatively, the CM245 Adjustable Angle Mounting Stand may be used. It includes slots that can be adjusted to any angle from horizontal to vertical.

Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR5000 CR7X CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000