Environmental Sensors & Chambers
PP Systems manufactures a range of external environmental sensors & chambers for use with our CO2 gas analyzers enhancing measurement capability.
Choose your measurement requirement
PAR | Temperature & PAR | Soil Temperature | Soil Moisture & Soil Temperature | Soil CO2 Efflux | Net Canopy CO2 Flux | Insect Respiration | Small Volume Sampling | Integrated Options | Accessory Compatibility Chart | For Older Instruments
Full Spectrum Quantum Sensor
PAR (Photosynthetically Active Radiation) – Full Spectrum
We offer the Apogee Full Spectrum Quantum Sensor for accurate measurement of PAR (Photosynthetically Active Radiation). It provides research-grade measurements under all light sources, including LEDs. The sensor housing features a fully potted, dome-shaped head, making the sensor completely weatherproof for self-cleaning. The improved spectral response increases the accuracy of LED measurements. See the graph below. Shown with optional leveling unit sold separately.
Technical Specifications
- Dimensions: 37 mm (Height) x 24 mm (Diameter)
- Cable Length: 5 meters
- Weight: 90 g
- Range: 0-3000 µmol m-2 s-1
- Calibration Uncertainty: ± 5%
- Measurement Repeatability: < 1%
- Long Term Drift: < 2% per year
- Operating: -40 °C to 70 °C; 0 to 100% relative humidity; can be submerged in water up to depths of 30 meters.
- Spectral Range: 389 to 692 nm ± 5 nm (wavelengths where response is greater than 50%)
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. The TRP-3 includes sample gas tubing to connect to the infrared gas analyzer and a standard tripod thread mount for use with commercially available tripods.
Technical Specifications
Dimensions
- Handle: 165 mm (Length) x 38.6 mm (Diameter)
- Tip: 20 mm
Cable Length: 1.5 meters
Weight: 0.36 kg
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
STP-2 Soil Temperature Probe
Soil Temperature
The STP-2 Soil Temperature Probe is a trusted plug and play accessory 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
Weight: 0.1 kg
Temperature Sensor (Precision Thermistor)
- Range: 0-50 °C
- Accuracy: ± 0.3 °C at 25 °C
HydraProbe (Stevens)
Soil Moisture & Soil Temperature
The Stevens HydraProbe is the most scientifically researched soil sensor available and is offered by PP Systems as an all-in-one in-situ sensor that can measure soil moisture and soil temperature. This rugged probe has completely sealed electronics making it fully immersible in water, and three strong, non-bending, and non-corrosive stainless steel tines.
For best results, the 3 prongs should be pushed into the ground until the sensor’s white body is flush with the soil surface.
Technical Specifications
Dimensions
- Handle: 152 mm (Length) x 26 mm (Diameter)
- Tines: 58 mm (Length)
Cable Length: 1.5 m
Weight: .12 kg
Soil Moisture Sensor
- Range: Dry – 100% of Saturation*
*Saturation of mineral soils depends on soil and typically occurs from 35 to 50 volumetric percent
Soil Temperature Sensor
- Range: -10 °C to 55 °C
- Accuracy: ± 0.3 °C at 25 °C
SRC-2 Soil Respiration Chamber
Soil CO2 Efflux
The popular SRC-2 Soil Respiration Chamber is the industry standard for rapid, accurate survey measurement of soil CO2 efflux. The lightweight chamber is constructed 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.* A built-in temperature sensor measures air temperature near the soil surface a well as an internal fan to flush and mix the air.
*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
- Weight: 0.9 kg
Temperature Sensor (Precision Thermistor)
- Range: -5 °C to 50 °C
- Accuracy: ± 0.5 °C at 25 °C
Compatibility
- CIRAS-4 Portable Photosynthesis System
- CIRAS-3 Portable Photosynthesis System
- TARGAS-1 Portable Photosynthesis System
- EGM-5 Portable CO2 Gas Analyzer
CPY-5 Canopy Assimilation Chamber
Net Canopy CO2 Flux
Our CPY-5 Canopy Assimilation Chamber is available for measurement of net canopy CO2 flux on low-lying vegetation and fruit. Constructed of rugged polycarbonate, the interior of the transparent chamber includes a user-adjustable PAR (Photosynthetically Active Radiation) sensor and an air temperature sensor near the soil surface. An air mixing fan and custom manifold system ensures uniform circulation within the chamber. An aluminum ring provides a good seal on the soil surface or on collars*. The Water Vapor Equilibrator comes standard.
*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
- Weight: 1.05 kg
Temperature Sensor (Precision Thermistor)
- Range: -5 °C to 50 °C
- Accuracy: ± 0.5 °C at 25 °C
PAR Sensor Fully cosine corrected
- Range: 0-3000 μmol m-2 s-1
- Accuracy: ± 5 μmol m-2 s-1
- Precision: 1 µmol m-2 s-1
Compatibility
- CIRAS-4 Portable Photosynthesis System
- CIRAS-3 Portable Photosynthesis System
- TARGAS-1 Portable Photosynthesis System
- EGM-5 Portable CO2 Gas Analyzer
Insect Respiration Chamber
Insect Respiration
Our Insect Respiration Chamber can be used to measure CO2 respiration from small insects. Insects are easily introduced into the chamber by sliding off the black end caps on either end.
There are no electrical connections required. Literally plug and play, the white pneumatic connector snaps right into the PLC “Gas” port on the back of the CIRAS-3. The short gas tubing labeled “A” connects to one end of the chamber.
Technical Specifications
- Chamber Dimensions: 15.1 cm (Length) x 25 cm (Diameter)
- Chamber Volume: 33 cm3 (not including gas tubing)
- Cable Length: .33 meters
- Chamber Weight: 65 g
Compatibility
- CIRAS-4 Portable Photosynthesis System
- CIRAS-3 Portable Photosynthesis System
Sample Injection Kit
Sample Injection Kit
Small Volume Sampling
PP Systems’ Sample Injection Kit includes a fully assembled and leak-tested injection port with five spare septa and an absorber column and stabilizing base to establish a zero baseline.
The injection port includes a 9 mm low-bleed septum that can withstand up to 50 injections (per the manufacturer’s specification) and a guide hole that will accommodate up to a 22-gauge syringe.
The lower, smaller diameter gas inlet fitting on the absorber column is designed to be used with 1/8” flexible gas tubing.
For best results, we recommend changing the septum every 25 injections.
Integrated Options
Further customize your system with these built-in options
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
Compatibility
H2O Sensor
An optional solid-state H2O sensor can be installed for accurate measurement of humidity.
Technical Specifications
- Range: 0-Dewpoint (mb)
- Accuracy: < 2% RH
WiFi
WiFi can be integrated for remote real-time monitoring.
Compatibility
Accessory Compatibility by Instrument
Environmental Sensors & Chambers for Older Instruments
PP Systems still manufactures some of our environmental sensors and chambers for older instruments.
CPY-4 Canopy Assimilation Chamber
Compatibility
- EGM-1 through EGM-4 Portable CO2 Gas Analyzers
- CIRAS-1 & CIRAS-2 Portable Photosynthesis Systems
TRP-2 Temperature/PAR Probe
Compatibility
- EGM-1 through EGM-4 Portable CO2 Gas Analyzers
- CIRAS-1 & CIRAS-2 Portable Photosynthesis Systems (adaptors may be needed)
- SBA-1 through SBA-4 CO2 Gas Analyzers (adaptors may be needed)
- WMA-1 through WMA-4 CO2 Gas Analyzers (adaptors may be needed)
STP-1 Soil Temperature Probe
Compatibility
- EGM-1 through EGM-4 Portable CO2 Gas Analyzers
- CIRAS-1 & CIRAS-2 Portable Photosynthesis Systems