Check the listing for details. TandD High Precision Illuminance, UV, Temp & Humidity Data Logger T and D. Condition: New. Listed at 130.00 USD. This is a new item. Here is some info I pulled off the web. With Humidity SensorTandD TR-74UI-S High Precision Visible and UltraViolet Light Data Logger Specifications Data Channels 1 Temperature/Humidity Channel (External) 1 Illuminance/Ultraviolet Light Channel (External) Temperature Range: -25°C to 70°C Accuracy: ±0.3°C (10°C to 40°C), ±0.5°C (All other Temps) Resolution: 0.1°C Sensor: Platinum Resistance Humidity Range: 0 to 99% RH Accuracy: ±2.5% (25°C and 10% to 85%RH, ±4% (Other) Resolution: 0.1% RH Sensor: Electrotatic Capacitance Note: At Temps other than 25°C and =0°C Add ±0.1%RH per Degree of Difference Illuminance Range: 0 to 130,000 lx Accuracy: +/-5% Resolution: 0.01lx (Minimum) Cum. Measurement: 0 to 90,000,000 lxhCosine Correction: ±1.5% at 10°; ±3% at 30°; ±10% at 60°; ±30% at 80° Ultraviolet Range: 0 to 30 mW/cm2 Accuracy: ±5% @25°C and 50% RH Resolution: 0.001mW/cm2 (Minimum) Cum. Measurement: 6260W/cm2 Relative Spectral Response: 260 to 400nm Data Storage Capacity 8,000 Measurements/Readings per Channel Sampling Interval 1, 2, 5, 10, 15, 20, 30 Seconds 1, 2, 5, 10, 15, 20, 30, 60 Minutes(User-Configurable) Recording Modes Endless: Overwrites When Capacity is Full One-Time: Stop Recording When Capcity is Full Power Source (1) AA Alkaline Battery (User-Replaceable) Battery Life Approximately 6 Months Interface USB Communications Infrared Communications (Requires #TR-57DCI) Operating Environment Temperature: -10°C to 60°C Humidity: 90% RH or Less (Non-Condensing) Sensors(Included) SHA-3151: Temperature and Humidity Sensor ISA-3151: Illuminance and UV Sensor Housing Material Alumina (Ceramic) Software Compatible with Windows 7 and Earlier Weight 68 grams (with Battery) Dimensions Logger: 55mm x 78mm x 18mm (Extruding Protrusions) Antenna: 60mm