Quantitherm PAR/Temperature Sensor
- Compact, fully portable handheld unit with QTP1 combined PAR/temperature probe sensor
- Temperature sensor range of 0 – 50°C with 0.02°C resolution
- LCD digital display of PAR and temperature values (°C or °F)
- QTP1 suspends vertically in reaction vessel of liquid-phase oxygen electrode chambers allowing light source calibration
- 0 – 5V analogue output of PAR and temperature signals
The QRT1 Quantitherm light meter and thermometer is specifically designed for use with the DW1, DW2/2 and DW3 liquid-phase oxygen electrode chambers.
Quantitherm overcomes the potential difficulties associated with accurately measuring PAR light levels and temperature within the reaction vessel of liquid-phase oxygen electrode chambers during photosynthetic experiments.
The temperature sensor operates across the range of normal measuring temperatures used for both photosynthesis research and cellular respiration studies and offers maximum accuracy in the 10°C – 40°C region.
For photosynthesis research, the PAR quantum sensor provides a displayed resolution of 1µmol m-2 s-1 throughout the 0 to 5,000 µmol m-2 s-1range and additionally will measure extreme saturating light intensities (such as those used in pulse saturation techniques for chlorophyll fluorescence analysis) up to a maximum of 50,000 µmol m-2 s-1 with a displayed resolution of 10 µmol m-2 s-1.
QTP1 Probe
The QTP1 probe sensor connects to the QRT1 control unit via a MiniDIN connection at the top of the control unit. The probe is designed to be mounted directly into the DW series electrode chambers via the use of suitable mounting collars (mounting collar for DW1 and DW2/2 supplied, collar for DW3 supplied with DW3).
Despite being intended for light source calibration in liquid-phase oxygen electrode chambers, the PAR/temperature probe sensor must not be submerged in liquid. Although the probe is splash proof, prolonged contact with liquid will irreversibly damage the sensor. Calibration of light sources should be performed prior to the addition of samples. Damage caused by submersion will not be covered by warranty.
The probe provides both a PAR quantum sensor and a thermistor bead for temperature measurement and is constructed from stainless steel and acetal. Temperature is measured by an RT curve matched type glass bead thermistor mounted centrally in the probe tip. Photosynthetically Active Radiation (PAR) levels are determined by a quantum sensor located in the side wall of the probe.
The probe provides both a PAR quantum sensor and a thermistor bead for temperature measurement and is constructed from stainless steel and acetal. Temperature is measured by an RT curve matched type glass bead thermistor mounted centrally in the probe tip. Photosynthetically Active Radiation (PAR) levels are determined by a quantum sensor located in the side wall of the probe.
The QTP1 probe may also be connected directly to the rear of the Oxylab oxygen electrode control unit. O2view software plots the temperature signal from the QTP1 in real-time as a chart recorder emulation on the same screen as the signal from the S1 oxygen electrode disc. PAR values are also displayed in the O2view software light source calibration routine providing a convenient display of measured values during the 2-phase light source calibration process.
