The Ludlum Model 9-7 Ion Chamber Display Unit is a digital readout and control unit that can be attached to any compatible ion chamber (sold separately) to provide remote monitoring in high-range beta and gamma fields. This instrument is a direct replacement for the discontinued Eberline Model RO-7, and will work with any of the existing Eberline RO-7 series detectors, extensions, and cables.
The gamma measurement range is 0.001 R/hr to 19.99 kR/hr, covered by four separate detectors. These ion chambers can either be connected directly to the instrument or via rigid extensions and/or flexible cables to achieve the length required. The detectors will remain functional with extensions/cables up to 152 m (500 ft) in length. The Model 9-7 automatically recognizes which detector is connected so no recalibration or adjustment is required when switching detectors.
The instrument display and controls are very similar to the original RO-7 to minimize any procedural changes or re-training. The backlit LCD displays easily-readable digits with a floating decimal point to indicate the measurement along the R/hr scale. When connected to the highest range detector, a separate kR/hr indicator is prominently illuminated to warn the operator of the higher scale in use. Controls include a rotary switch for selecting instrument on/off and battery status, an LCD backlight switch (lamp on/off), and a zero adjust knob.
Also Available: Model 9-7-1 (PN: 48-3756), a version that displays measurements in Sv/h units.
Note: The Model 9-7 is not RoHS compliant.
* Note: The Model 9-7 requires modification to use the 9-7-BHL-1 detector.
Note: Other cable lengths are available upon request.
