Specification:Item Type: UVA MeterMaterial: Silica Gel, ABSIrradiance Range: 0-1999 μW/cm² UVAResponse: λp=320-400 nmResolution: 1 μW/cm²Conversion Rate: 3.0 Readings / SecDisplay: 3.5-bit LCDSize: 0.4 Inches HighOperating Temperature: 32℉ to 90℉Operating Humidity: 5% to 80% RHAccuracy: +10% REF NISTProduct Size: Approx. 165 x 75 x 30mm / 6.5 x 3 x 1.2inPower Supply: 2x1 5V AA Battery (Shipped Without Battery)Lens: UV GlassWeight: Approx. 231g / 0.5ozPackage List:1 x UVA Meter1 x User ManualNote:Lamp aging test using RGM‑UVA meter correctlyWear goggles (uv glasses) when checking uv lamp.Allow the lamp to warm up (at least 5 minutes) before reading.When checking the aging of lamps, keep the measuring distance and position unchanged.When the output drops to 30% to about 70% of the original, the bulb should be replaced (new) reading. Take overall readings at exposure distance or inspect individual lamps near the face. Track hours and readings on the chart.If you are not sure what the original new value was, replace the bulb with a new value of the same type and compare it with the old value.Do not expose the meter to extreme temperature, humidity, shock, or dust.Clean the instrument with a soft, dry cloth. Keep the sensor free of oil and dirt.