This Omega CT-485B-110V Dual-Pen 8" Recorder Microprocessor Temperature Humidity is in real good condition and guaranteed to functions 100%. It came from a local lab that was upgrading equipment and we can accept pay pal or your credit card. Please contact me with any questions. Specifications Measurement Inputs: Temperature and humidity, with plug-in external sensor, removable for remote location, 6' extension cable included; 0.02 to 1.20 Vdc signal with voltage input adaptor TEMPERATURE Range: -17 to 49C (2 to 120F) Accuracy : 1C Sensor: Solid state Response Time: 5 minutes for 63% step change Display Resolution : 1C/1F HUMIDITY Range: 2 to 98% RH Accuracy: 3% @25C, between 20 and 90% of range (5% below 20% and above 90% @25C) Sensor: resistive polymer. Not recommended for use in corrosive air environments Response Time: 5 minutes for a 30 to 80% step change Display Resolution: 1% RH 2 1?2 digit LCD, 0.5" high; low battery Display Modes: Front panel switchable between C, F and %RH for continuous digital display; max/min storage for both temperature and humidity or flashing to indicate alarm condition ELECTRONICS Type: Microprocessor-controlled and linearized high and low peak hold for both temperature and humidity, re-initializes position at every chart change CHART Type: 8" circular, linear radial divisions, double sided; 1, 7 and 32 days, C and F scales CHART DRIVE Type: Stepper motor Ranges: 1, 7 and 32 day, selectable Accuracy: 1% of rotation Chart Hold Down: magnetic hub lock RECORDING PENS Type: Disposable fiber tip, red for temperature, blue for humidity PEN DRIVES Type: Motorized linear screw drive Deadband: 1F, 1% RH Zero: Automatic zero during chart change or power interruption Penlift: Automatic on door opening; pens are door mounted and swing clear of the chart when door opens Pen Arms: Clear plastic to allow full chart viewing