The S141 Light Sensor has been developed for use with the A111 Halogen Light Source and C901 Logger Pro software to provide irradiance data in units of µmol quanta/m2/s. Customized setup and calibration files are available to users of Logger Pro software. The sensor can be calibrated by the user for stand-alone operation or for relative measurements of light intensity.  The maximum photosensitivity of the sensor is in the 500-600nm range (most appropriate for halogen light source).

The Light Sensor may be mounted directly under Qubit Systems’ G112 Flow-Through Leaf Chamber for use in photosynthesis measurements with the halogen light source.

The S141 Light Sensor is included in PH1LP Photosynthesis Package

Specifications:

• 0-4 V analog output to data interface
• Small surface area (2.4 x 2.8 mm)
• Selectable ranges (0-100, 0-300, 0-1150 µmol quanta/m2/s) with corrections for use under leaves or in direct halogen light.
• size (h/w/l) cm:  3.0/5.4/8.3
• weight (g): 110
• materials: plastic (black)
• warranty: 1 years

SpectraPen Z850 is a handheld spectrometer. The SpectraPen is powered by Li-ion rechargeable battery and does not require any PC or other bulky accessories.  Light wavelength and intensity readings of any light source are instantly displayed as spectral traces on the SpectraPen touch screen display.  Optional  fiber optic cable is also available.

The SpectraPen is pre-configured for one of the two applications: spectrum measurements at UV/VIS 340 to 780 nm or NIR 640 to 1050 nm.

Features:

• Handheld and lightweight
• Durable and low-cost
• Wide spectral response range: UV/Vis: 340 – 780 nm or NIR: 640 – 1050 nm
• No PC needed for operation
• Intuitive touch-screen use
• Flexibility in measurement setups
• Battery-powered
• USB connectivity for charging and data downloading

Applications:

• Visible light source testing
• Color measurement
• Chemical measurement

Software:

• Different operation modes: scope, absorbance, transmittance
• Different tools: zoom, marker, auto scale, curve smoothing
• Automated setting of the integration time
• Data browsing
• Data averaging

PC Connectivity:

• Spectrum data collection
• Export to Excel
• Online control
• Firmware update

Technical Specification:

• Optical entrance:  SMA 905 to 0.22 numerical aperture single strand optical fiber
• Spectral response range: 340nm – 780nm or 640nm – 1050nm
• Spectral response half width *: 9 or 8
• Spectral stray light *:  -30 dB
• Wavelength reproducibility: +/- 0.5 nm
• Integration time: 5 ms – 10 s
• Number of pixel: 256
• Dimension of pixel: 0.5 x 15.8 mm
• Touch screen: 240 x 320 pixel; 65535 colors
• Memory capacity: 32 MB (up to 8000 measurements)
• System data: 16 bit AD conversion
• Dynamic range: High gain- 1:4300; low gain- 1:13000
• Communication: USB
• Dimensions: 15 x 7.5 x 4 cm
• Weight: 300 g
• Case: Splash-proof
• Battery: Li-ion; rechargeable via USB port of a PC
• Battery life: 48 hours (continuous operation)
• Operating temperature: 0 to +50 ºC
• Storage temperature: -20 to +70 ºC

** When monochromatic light of Λ = 550 nm or Λ = 850 nm is input, spectral stray light is defined as the ratio of the count measured at the input wavelength, to the count measured at a wavelength 40 nm longer or shorter than the input wavelength.

The Z765 Light Controller works together with the Z760 LED Light Sources and controls their output, timing and intensity without the use of a PC.

• User-friendly light control via a touch-screen.
• Supports up to 4 lights or 4 colors.
• Each light can be configured and calibrated independently.
• Precise control over the light mode, intensity and timing (usec to hours).
• Light modulation according to a predefined function (continuous, pulse, sine, triangle)
• Supports generation of very short (100 us) pulses.
• No PC needed.

Alternatively to the Z765 light controller achieve precise control over the light mode, intensity and timing with light studio software and a PC.

light studio software window

Z760 LED Light Sources are arrays of high-performance light emitting diodes (LEDs) that can operate in multiple regimes: flash, continuous light, harmonically modulated light, or they can work with a user-defined modulation. Different versions of the device vary spectrally from UVA to IR. The device can be used as a stand-alone unit or it can be integrated into other instruments, such as the Z200 Open – FluorCam, Z230 Arch FluorCam, Z150 Photobioreactor. Base LED Clusters can be used to outfit growth rooms.

Instrument Highlights:

• High light output – up to 3,000 µmol(photon)/m2/s at the distance of 20 cm (depends on the LED type).
• Measuring flash duration 10-40 µs
• Uniform light distribution over the desired area.
• Both panel and control unit cooling (automatic control).
• Hardware or software control of the light regime (flashes, continuous light, used-defined modulation), timing, and intensity.
• Different color versions varying spectrally from UVA to Infra-Red
• standard colors available: white cold, white warm, blue royal, red-orange, red, blue, green
• Bi-color, tri-color versions available.
• Long longevity of LEDs (6-7 yrs)

Stand Alone Standard Panel Size……Number of Mounted LEDs:

• 13 x 13 cm …. 72 LEDs (one color)
• 13 x 13 cm ….64 LEDs (bi-color)
• 20 x 20 cm …. 180 LEDs (one color)
• 20 x 20 cm ….90 LEDs (bi-color)
• 20 x 20 cm …. 168 LEDs (three colors)
• 30 x 20 cm …. 104 LEDs (one color)
• 30 x 20 cm …..104 LEDs (bi-color)
• 30 x 20 cm …. 105 LEDs (three colors)

Custom sizes also available for growth rooms as multiples of a Base LED Cluster (80cm X 27cm) contact Qubit Systems for information

 Base LED cluster

Full control of light mode, intensity, timing over both very long and short (µsec) time intervals can be provided with Z765 Light Controller. No PC needed

Light Studio Software:

• User-defined protocol writing.
• Precise control over the light mode, intensity and timing (seconds to hours).
• Supports up to 4 lights or 4 colors.
• Each light (color) can be configured and programmed independently.
• Light modulation according to a predefined function (continuous, pulse, sine, triangle).
• Unlimited number of light/dark phases.

References:

Solhaug K.A. et al. (2010): Planta 231: 1003-1011

The new Z800 Spectrometer was developed for high-resolution, fiber optic spectroscopy applications in the UV/VIS to NIR range. It can be used as a stand-alone instrument or as a substantial enhancement of other instruments to analyze spectral composition of irradiance. Ultra-high sensitivity of the instrument allows measuring fluorescence emission spectra of individual cells when combined with Z500 Micro FluorCam. The spectra can be measured in the range from UV (200 nm) to NIR (980 nm) with FWHM bandwidth of 3.5 nm. Fast recording can capture as many as 100 spectra per second with data resolution of 16 bits.

Key features

• Ultra-high sensitivity.
• Suitable for microspectrophotometry.
• FWHM bandwidth of 3.5 nm.
• Small-footprint,
• modular, robust, and thermally stable.
• Very low heat generation.
• 10 µs – 10 ms duration of flashes.
• Variable exposure time, from 1 millisecond to minutes.
• Kinetic spectra (max. 100 per second).

Specifications:

• Optical Entrance: diameter 0.5 NA = 0.22 mounted in SMA-coupling, dismountable
• Entrance slit: 70 µm x 1400 µm (optical entrance)
• Grating: Flat-field correction
• Spectral range: 200 nm – 980 nm
• Wavelength accuracy absolute: < 0.5 nm
• Reproducibility: < 0.1 nm
• Temperature - induced drift <0.01 nm/K
• Spectral distance of pixel: Δλ pixel ~ 0.8 nm
• (FWHM: Full width half maximum): Δλ < 3 …4 nm (UV-NIR Version)
• Straylight: 0.1 % measured at 340 nm with deuterium lamp (transmission of NaNO2 solution, 50 g/l, 1 cm)
• CCD Array: Thermoelectrically cooled Hamamatsu S 7031
• Number of pixels: 1044 x 64
• Dimensions of pixels: 24 x 24 mm2
• System data: 16 Bit AD conversion
• Noise: 2…4 count standard deviation