bitstrong High-precision digital illuminance meter (with temperature measurement and data recording function) BS-WT81 series

This digital illuminance meter is suitable for a wide range of applications, from lighting management in offices and factories to light source management in humid plant factories. The light receiving unit employs a "photodiode + cosine corrector + luminous sensitivity correction filter" to reduce errors due to incident angle and wavelength characteristics. Furthermore, it has a built-in high-sensitivity NTC thermistor, allowing simultaneous measurement of ambient temperature with an accuracy of ±1.0°C. Depending on your application, you can choose between the "BS-WT81," which allows for easy measurement with the unit alone, and the "BS-WT81B," which enables data output via smartphone connectivity. [Main Features] · Highly reliable optical design: The light receiving unit employs a combination of a silicon photodiode, a "cosine corrector," and a "luminous sensitivity correction filter." It corrects for light from oblique angles and wavelength differences due to the light source, deriving accurate values. · Wide range measurement & high-speed sampling: Measures a wide range from 0 to 200,000 Lux with auto-ranging. High-speed sampling of 2 times per second captures fluctuating light sources in real time. • Strong environmental management capabilities with "NTC temperature measurement" and "humidity resistance": High-precision NTC thermistor measures ambient temperature (-9.9 to 49.9°C) simultaneously with illuminance. It supports operating humidity up to 90%RH, so it can be used safely even in humid environments such as greenhouses and agricultural houses. • Comprehensive measurement and recording modes: In addition to the current value, it supports maximum value (MAX)/minimum value (MIN)/difference display (Δ mode). The built-in memory can record up to 1000 data points (automatic)/67 data points (manual). *BS-WT81 (Standard): Only numerical values can be checked on the main unit screen (automatic recording interval is fixed at 10 seconds). *BS-WT81B (Bluetooth): Recorded data can be output as CSV (Excel) via the app, and the recording interval can be changed. • Data management via smartphone connectivity (BS-WT81B only): Using the dedicated app (iOS/Android compatible), you can check measurement values remotely, display trend graphs, export data for convenient management on a PC, and set threshold warnings (the screen icon flashes when the set value is exceeded).
Equipment & Inspection: Environmental checks based on JIS illumination standards in offices, schools, and factories; inspection of emergency lights. Manufacturing & Design: Verification of LED lighting distribution; measurement of illumination unevenness in work lines. Agriculture & Research: Management of sunlight and temperature monitoring in greenhouses and plant factories. Spatial Design: Lighting adjustment for store displays and photography studios.
*1: The backlight will not light up (operate) while data is being recorded, read, or deleted. *2: The BS-WT81 only allows you to check numerical values on the main unit screen (automatic recording interval is fixed at 10 seconds). External data output (to Excel, etc.) and changing the recording interval are only possible with the Bluetooth-enabled BS-WT81B.