X9₂ Irradiance Radiometer
RCH-0 High Intensity Irradiance Detector
RCH-1 High Intensity Irradiance Detector

The X9₂ (Xnine two) meter in combination with one of Gigahertz-Optik’s RCH-0 or RCH-1 type light detectors forms a compact lightweight radiometer for the measurement of irradiance in W/cm² and irradiance dose in J/cm² of high intensity light sources. A most common use is the periodical check and adjustment of the irradiance level of spot and flat field sources in UV and Blue Light curing applications. The RCH line of detectors is designed for high intensity hot UV and Blue Light radiation sources typically used in the curing process. The low profile RCH detectors enable irradiance measurement just 8mm above the exposure plane. UV curing spot sources with fiber light guides up to 8mm diameter can be measured due to the detector’s 9mm diameter measurement aperture with diffuser window. Both the RCH-0 model with a flexible light guide and RCH-1 with a rigid light guide are available. Both can be ordered with different spectral responsivities, e.g. broadband UV, UV-A and Blue. The X9₂ meter itself is a handheld battery operated meter with 9 mm high character LCD display for easy viewing. Its high linear current to voltage amplifier provides seven manually or automatically selected gain ranges. The maximum error within this wide dynamic range is 0.2 %. Operating the X9₂ is simple. Once set-up all settings are stored and recalled on next power-up unless re-programmed. The meter is operated by a standard 9 V battery. Meter and both detectors fit into the BHO-05.hard-shell case.