Days Monitor refrigerators, supply rooms, food storage, chemical warehouses, animal quarters, incubators, goods-in-transit, walk-in chambers, biological materials, and manufacturing plants. Single-use, disposable recorder displays temperatures on a 36-inch strip chart. Records for 10 or 40 days. Temperature range is –20 to 100°F and –28 to 38°C. Displays both °F and °C on the same chart. Accuracy is ±1°C (±2°F). Solid-state, battery-driven, quartz-crystal controlled motor turns the chart with an accuracy of better than 1 second per day. Temperature sensor is bimetallic.