450A-1型数字袖珍一氧化碳测量仪测量环境中的一氧化碳(CO)浓度，并在双路数字液晶显示屏上显示测量结果。 除了测量外，还显示了自上次复位以来所记录的最大CO值。 一个可听到的一氧化碳警报器会发出二氧化碳浓度超过25ppm的警告。 在光线不好的环境下观看，内置的背光使显示器更明亮。 型号450A包括带扣、腕带、电池。

Range:0 to 999 ppm.

Accuracy (at 20 ±5°C, 50 ±20% RH):±20% @ 0 to 100 ppm; ±15% @ 100 to 500 ppm.

Resolution:1 ppm.

Display:Dual digital LCD display.

Response Time:Less than 60 seconds.

Sensor:Electrochemical carbon monoxide sensor.

Temperature Limits:-10 to 60°C (14 to 140°F).

Humidity Limits (Non-Condensing):5 to 99% RH.

Power Requirements:(3) 1.5 V AAA alkaline batteries, included, user replaceable.

Battery Life:250 hours with backlight off; 35 hours with backlight on.

Weight:4.23 oz (120 g).

Alarms:Audible, preset at 25 ppm.

Agency Approval:CE.