Profile: Bentham Instruments Ltd. is a manufacturer and supplier of instruments and custom systems for applications involving the measurement of light. We specialize in the field of light measurement. Our TMc300 range of monochromators control grating position using precision gears and a microprocessor controlled microstepping drive. It's programmable detector changeover mirror and detection electronics with software selectable dual inputs allow spectral scans over wide wavelength ranges to be accomplished without manual intervention. It's features include constant wavelength accuracy at all grating angles, fast wavelength acquisition, and zero backlash. One of our detector series products accepts all 28 mm diameter side-window photomultiplier tubes. It is designed to be integrated easily and unobtrusively into light measurement systems where dark current or temperature dependent gain variations need to be minimized. We also avail a wide range of light measurement systems for various applications.