The series III provides an automatic audible and visual warning of the presence of ionizing radiation. The audible alarm is a high-pitched bleep with a repetition rate approximately proportional to the intensity of radiation. The visual alarm is a bright flashing light that is clearly visible to the wearer and other people working in the same area – this is particularly useful in areas of high background noise and for personnel with hearing difficulties. When not exposed to radiation the unit effectively self-checks and briefly emits an audible and visual warning a few times per hour to confirm its state of readiness. The pocket-sized instrument is operated by a single dry cell battery.
- Audible and visual alarms for improved safety.
- Pocket size, high performance, consistent reliability.
- Detects x-rays, gamma-rays and hard beta-rays.
- Radiation Detected: X-ray, gamma-ray and hard beta-ray ionizing radiation.
- Alarm Signal: High-pitched audible warning pulses with a repetition rate proportional to the dose rate; plus a bright visual indication.
- Self-Check: Background pulses at approximately 30 minute intervals.
- Normal Sensitivity: CS137 10µSv/h produces pulses at 25 second intervals. CS137 125µSv/h produces pulses at 10 second intervals.
- Maximum Response Time: Equal to time between pulses at the applied radiation level. Approx 10 seconds at 225Sv/h.
- Current Drain: 30pA between warning pulses, 6 mA during warning pulses.
- Battery: Single Alkaline-Manganese type battery (e.g. MN1604).
- Battery Life: On background typically in excess of 4 months.
- Controls: None.
- Detector: Geiger-Muller Tube.
- Overall Size: 60 x 25 x 95 mm.
- Weight: 120 grams including battery,
- Operating Temperature Range: -10 to 65°C.