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Quality Instrumentation for the Life Sciences

Environmental Sensors & Chambers

PP Systems manufactures a range of external environmental sensors & chambers for use with our CO2 gas analyzers enhancing measurement capability.

apogee quantum sensor

Quantum Sensor

PAR (Photosynthetically Active Radiation)

Our quantum sensor (Apogee) is available for accurate measurement of PAR (Photosynthetically Active Radiation). It is specifically calibrated for use in sunlight conditions. The sensor housing features a fully potted, dome-shaped head, making the sensor fully weatherproof for self-cleaning.  Shown with optional leveling unit sold separately.

Technical Specifications

  • Range: 0-3000 µmol m-2 s-1
  • Calibration Uncertainty: ± 5%
  • Measurement Repeatability: < 1%
  • Long Term Drift: < 2% per year
  • Cable Length: 5 meters
Soil Temperature & PAR Measurement

TRP-3 Temperature/PAR Probe

Temperature & PAR

Our TRP-3 Temperature/PAR probe can be used for measurement of temperature and PAR. It consists of a rugged, aluminum housing with a black foam cover. A standard tripod thread mount is included for use with commercially available tripods.

Technical Specifications

Temperature Sensor (Precision Thermistor)

  • Range: 0-50 °C
  • Accuracy: ± 0.3 °C at 25 °C

PAR Sensor

  • Fully cosine corrected
  • Range: 0-3000 μmol m-2 s-1
  • Accuracy: ± 10 μmol m-2 s-1
  • Cable Length: 1.5 meters
soil temperature measurement

STP-2 Soil Temperature Probe

Soil Temperature

The STP-2 Soil Temperature Probe is available for measurement of soil temperature. Electronics are housed in an anodized aluminum enclosure with a stainless steel tip. This rugged sensor is commonly used with the SRC-2 Soil Respiration Chamber and CPY-5 Canopy Assimilation Chamber.

Technical Specifications

  • Dimensions: Handle: 200 mm (Length) x 18.7 mm (Diameter)
  • Tip: 125mm Length
  • Cable Length: 1.5 meters

Temperature Sensor (Precision Thermistor)

  • Range: 0-50 °C
  • Accuracy: ± 0.3 °C at 25 °C
soil moisture and soil temperature

HydraProbe II (Stevens)

Soil Moisture & Soil Temperature

The Stevens HydraProbe II is an all-in-one in-situ sensor that can measure both soil moisture and soil temperature.

For best results, the 3 prongs should be pushed all the way into the ground until the white body of the sensor is flush with the soil surface.

Technical Specifications

Soil Moisture Sensor

  • Range: 0-100% (dry to fully saturated)

Soil Temperature Sensor

  • Range: -10 °C-55 °C
  • Accuracy: ± 0.3 °C at 25 °C
  • Cable Length: 5 meters
Soil Respiration

SRC-2 Soil Respiration Chamber

Soil CO2 Efflux

Our SRC-2 Soil Respiration Chamber is available for measurement of closed system soil CO2 efflux. It is constructed out of rugged PVC with a convenient handle for placement on the soil surface. A stainless steel ring provides a good seal on the soil surface or on collars. It includes a temperature sensor for measurement of air temperature near the soil surface.

Optional collars are available from PP Systems.

Technical Specifications

  • Dimensions: 150 mm (Height) x 100 mm (Diameter)
  • Volume: 1171 ml
  • Area: 78 cm2
  • Cable Length: 1.5 meters

Temperature Sensor (Precision Thermistor)

  • Range: 0-50 °C
  • Accuracy: ± 0.3 °C at 25 °C
net canopy CO2 flux

CPY-5 Canopy Assimilation Chamber

Net Canopy CO2 Flux

Our CPY-5 Canopy Assimilation Chamber is available for measurement of closed system net canopy CO2 flux. It is transparent and constructed out of rugged polycarbonate with an aluminum ring, which provides a good seal on the soil surface or on collars. It also includes sensors for measurement of air temperature and PAR within the chamber.

Optional collars are available from PP Systems.

Technical Specifications

  • Dimensions: 145 mm (Height) x 146 mm (Diameter)
  • Area: 167 cm2
  • Cable Length: 1.5 meters

Temperature Sensor (Precision Thermistor)

  • Range: 0-50 °C
  • Accuracy: ± 0.3 °C at 25 °C

PAR Sensor

  • Fully cosine corrected
  • Range: 0-3000 μmol m-2 s-1
  • Accuracy: ± 10 μmol m-2 s-1
Insect Respiration chamber

Insect Respiration Chamber

Insect Respiration

Our Insect Respiration Chamber can be used to measure CO2 respiration from small insects.

Environmental Sensors & Chambers

PP Systems manufactures a range of external environmental sensors & chambers for use with our CO2 gas analyzers enhancing measurement capability.

Technical Specifications

  • Chamber Dimensions: 15.1 cm (L) x 25 cm (D)
  • Chamber Volume: 33 cm3 (not including gas tubing)
  • Chamber Weight: 65 g

Integrated Options

Further customize your system with these built-in options

O2 Sensor

O2 Sensor
An optional electrochemical O2 sensor can be installed for measurement of oxygen in addition to CO2.

Technical Specifications

  • Range: 0-100%
  • Response Time: ≤ 15 seconds at 23 ± 2 °C
  • Linearity: ± 1.0% of full scale

H2O Sensor

An optional solid-state H2O sensor can be installed for measurement of H2O in addition to CO2.

Technical Specifications

  • Chamber Dimensions: 15.1 cm (L) x 25 cm (D)
  • Chamber Volume: 33 cm3 (not including gas tubing)
  • Chamber Weight: 65 g
environmental sensors & chambers