This economical monitor is simple to operate and features a unique patented sensor that is highly accurate. Features a large 3-digit LCD, factory-set alarm and molded high-impact case. The unit has accuracy to +/-4% over the full 0-50 degrees C range, resolution to 0.1% oxygen, and a rapid response time of 10 seconds to 90% indication. Weighs only 312g (11oz.) and is small enough to fit inside a pocket. Comes complete with a 9V battery (up to 200 hours operation), and a 99cm (39') long cord for earphone use. No field adjustment required.

This is only for Sierra Monitor, Model SPC21111. It may differ from the image shown in color, features, may be an accessory, etc. Please refer to the model number or contact us if you have any questions.