Plant Science PAR Quantum sensor – the traditional sensor for plant studies PAR ‘Special’ – a sensor with a spectral response to match the light used by a typical green plant PAR Energy – this sensor has the same spectral response as the PAR Quantum but in watts m² Red/Far-Red Sensor – a 2-channel sensor with wavelengths centred at 660nm and 730nm Hansatech Leaf Chamber Fibre Optic Systems – our standard sensor responses can be supplied with a fibre optic probe PAR Line Quantum Sensor