Reed Instruments Data Logging Environmental Meter with NIST Certificate, Humidity/Air Velocity/Light/Temperature (R4700SD-NIST)

Data Logging Environmental Meter with NIST CertificateMeasures relative humidity, air velocity, light levels and temperature with a type J/type K thermocouple thermometerReal time data logger with integral 2GB SD memory card (optional)Air velocity is measured in m/s, ft/min, km/h, mph or knotsLight levels are measured in ftc or lux