The box includes the Wahl 731-12 unit, a box of extra unused 24-hour charts, and a key. The unit appears to be in excellent shape, although I have no idea how to use this so I can't verify anything. Note that in the photo of the unit the card inside is curled up.
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Dickson THDS Temperature and Humidity Chart RecorderTemperature Range: User selectable -20 to 50oC, +5 to +40oCTemperature Accuracy: +-1.0oCTemperature Sensor: ThermistorHumidity Range: 0 to 95%Humidity Accuracy: +-2% from 0 to 60%, +-3% from 60 to 95%Humidity Sensor: Monolithi IC humidity sensorRecording Time: 24 hour, 7 day or 31 day
Chart recorder DR4501 120/240V, 24hr, Temperature, Single pen, Honeywell This is a single pen chart recorder made by Honeywell, part number DR4501-1000-00-000-0-00-0111. In good used condition with some tape residue along the bottom edge. The glass is somewhat loose.
Chart recorder, Circular, Temperature, AR15BDN Honeywell TESTED This is a used chart recorder made by Honeywell, model AR15BDN in good used condition. The recorder was powered on with a 3 wire RTD thermocouple installed. The timer motor works well and the pen responded as the thermocouple was heated.
Chart recorder, Circular, Temperature, AR15BDR2057 Honeywell TESTED This is a used chart recorder made by Honeywell, model AR15BDR2057 in good used condition. The recorder was powered on with a 3 wire RTD thermocouple installed. The timer motor works well and the pen responded as the thermocouple was heated.
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