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Enabling better global research outcomes in soil, plant & environmental monitoring.

3010-GWK1 Gas Exchange Chamber

The Gas-Exchange Chamber 3010-GWK1 is designed to investigate medium-sized samples like small branches, big leaves, or fruits under well-defined climate controlled conditions. To provide this, the 3010-GWK1 chamber has a highly efficient temperature control, a transversal fan for fast ventilation, and pneumatic connectors for air supply.

The 3010-GWK1 includes internal sensors to accurately monitor temperature at three sites, as well as air humidity and PAR (photosynthetically active radiation). Externally the chamber has additional sensors for temperature and PAR.

For CO2 gas exchange measurements, the chamber can be operated as part of the the GFS-3000 in place of the Standard Measuring Head 3010-S. The chamber can also be operated directly by a computer using an optional interface. The top part of the chamber can be manufactured to match requirements for particular samples upon request.

The 3010-GWK1 also facilitates the option of studying spatially resolved chlorophyll fluorescence under defined conditions, because its sample area matches the imaging area of the IMAGING-PAM M-Series MAXI version.

The LED-Panel RGBW-L084 provides illumination for the Gas-Exchange Chamber 3010-GWK1. It has a densely packed array of high-power colour LEDs for uniform light distribution. Individually adjustable colours (Red, Green, Blue and White) exhibit a combined maximum output of 2000 μmol s-1 m-2 or better.

When using the Gas-Exchange Chamber 3010-GWK1 in combination with the GFS-3000, the maximum flow rate is 1.9 l/min. Leaf samples producing too much humidity can limit the system capabilities.

Gas-Exchange Chamber 3010-GWK1

Design: Chamber consisting of an aluminium cooling block with two pneumatic connectors and transversal fan, flat polymer lid or user-designed cuvette; micro-processor controlled electronics with connectors for temperature sensors, humidity sensor, PAR-sensors, GFS-3000 or 3010-I/GWK connection, power-input; cooled with Peltier-cooling units and ventilator
Measurement of chamber and ambient temperatures: Pt 100 type A, range -10 to 50°C, accuracy ±0.1°C
Leaf temp. measurement: Thermocouple, range: -10 to 50°C, accuracy ±0.2°C
Temperature control: Three modes of temperature control: Constant cuvette temperature, constant leaf temperature, follow ambient temperature with an offset
Temperature control range: -10°C to 50°C depending on ambient temperature and radiative heat intake.
With 4l volume, dark: 10 K below ambient temperature and 25 K above ambient temperature.
With flat lid, dark: 20 K below ambient temperature and 35 K above ambient temperature
Relative humidity sensor: Range: 0 to 100% r.h., accuracy: ±1.5% (5 to 95% r.h.), T90 response time (11 to 75% r.h.):
External miniature quantum sensor: Mini Quantum Sensor MQS-B/GWK1 outside of chamber. Selective PAR measurement, range 0 to 2500 μmol m-2 s-1, accuracy ±5%, cosine corrected (measuring photosynthetic photon flux density PPFD)
Internal light sensor: Selective PAR measurement, range 0 to 2500 μmol m-2 s-1 PAR, accuracy ±10%, two sensors, one in the upper and one in the lower part of the cuvette
Cuvette ventilation system: Transversal fan
Maximum sample area: 14 cm x 10 cm
Pneumatic connectors: Hose fittings for 10/8 mm (OD/ID) tubing
Inner volume of the cooling unit alone: 840 ml (up to edge of aluminium frame)
Power supply: AC Power Supply 3020-N for laboratory operation
Power consumption: Max. 45 W
Operating temperature: -5 to 45°C
Dimension of cooling unit: 26 cm x 25 cm x 19.5 cm (L x W x H)
Weight: 6.9 kg including cables and tubes

Cuvette

Standard: Flat lid (inside: 16 cm x 14.5 cm, outside: 18.5 cm x 17 cm, volume: 320 ml)
Other designs: Available upon request

AC Power Supply 3020-N

Design: DC power supply unit for laboratory use
Output voltage: 16 V DC
Output power: 135 W
Mains power supply: 100 to 240 V AC, 50/60 Hz
Operating temperature: 0 to 60°C
Dimensions: 20 cm x 8 cm x 5 cm (L x W x H)
Weight: 1 kg

LED-Panel RGBW-L084

Design: LED-Panel fitting to the gas exchange chamber 3010-GWK1: Illuminated area 14 cm x 12 cm. LED Colours: red, green, blue and white.
Maximum output (all colours together): 2000 μmol m-2 s-1 or better. Air cooled; with separate power supply. Colours can be mixed with red, green, blue, and white in steps of intensity 0 to 100 or more; total intensity can be chosen in steps of 0.1%; operation with GFS-Win software via RS485 connector.
RGBW High Power LEDs: Blue: 455 ±10 nm, HBW (half bandwidth) 440 – 460 nm
Green: 525 ±10 nm, HBW 500 – 545 nm
Red: 625 ±5 nm, HBW 620 – 640 nm
White: 450 ±10 nm, HBW 435 – 460 nm; second peak at 590 ±25 nm, HBW 510 – 640 nm with tail up to 800 nm
Homogeneity of light distribution: ± 10% within the 14×12 cm area or ± 3 μmol m-2 s-1 (whatever is bigger).
PAR measurement: PAR sensors with multiplier between -50 and -800 μmol m-2 s-1 per μA result in a range of 0 to 6400 μmol m-2 s-1, resolution: 1 μmol m-2 s-1
Fuse: 10 A slow-blow fuse, 5×20 mm
Input voltage: 16 V, 8 A
Voltage inside: up to 36 V
Power supply: AC Power Supply 3020-N for laboratory operation
Operating temperature: -5 to 45°C
Dimension: 27 cm x 19 cm x 13 cm L x W x H
Weight: 2.8 kg

Temperature

The 3010-GWK1 chamber is equipped with four temperature sensors: Three Pt100-type sensors measuring temperature of inside air, near the cooling elements and externally. The fourth temperature sensor is a thermocouple for leaf temperature measurements.

Temperature Control Modes

Temperature control can be switched between three modes: Constant temperature of chamber air, constant leaf temperature, or temperature variation parallel to ambient temperature with an adjustable offset. Temperature profiles can be realised with user-programs. Due to the highly efficient Peltier technology, the cuvette temperature can be regulated fast and accurately.

Light

The 3010-GWK1 chamber has two sensors for photosynthetically active radiation (PAR): A cosine corrected sensor (MQS/B-GWK1) measures ambient PAR at sample level outside the chamber, and a special miniaturised sensor measures PAR inside the chamber.

Humidity

A maintenance-free sensor measuring the relative humidity with an accuracy ±1.5% r.h. is located inside the gas-exchange chamber.

Ventilation

The gas-exchange chamber features a transversal fan for effective ventilation. Its speed is adjustable in 10 steps.

Operation

The 3010-GKWK1 chamber can be controlled by the GFS-3000 or by a laptop using an optional interface. In both configurations, the 3010-GKWK1 chamber requires its own power supply.

LED-Panel RGBW-L084

The newly designed LED-Panel RGBW-L084 with a densely packed array of high-power colour LEDs, facilitates measurements under various illumination options. The colours, Red, Green, Blue and White can be adjusted independently with a maximum output (all colours together) of 2000 μmol m-2 s-1 PAR or better.

The LED-Panel RGBW-L084 fits perfectly on top of Gas-Exchange Chamber 3010-GWK1 with an illuminated area of 14 cm x 12 cm. At the side it provides an additional socket for the connection of a PAR sensor. The LED-Panel RGBW can be operated via GFS-Win software in combination with a 3010-GWK1, GFS-3000 or stand alone using the Interface 3010-I/GWK.