The EXTECH 407001 Environmental Meter is a versatile and durable instrument designed for comprehensive environmental monitoring. It combines five essential measurement capabilities into a single, portable device: humidity, temperature (using both a thermistor and Type K thermocouple), air velocity, light intensity, and sound level. The meter's dual LCD display provides simultaneous readings, enhancing user convenience and efficiency. Features like data hold, min/max recording, and a built-in low-friction vane wheel ensure accurate and reliable data collection. The included accessories, such as a windscreen, thermocouple probe, and pouch case, further enhance its usability in various field conditions. The optional data acquisition software allows for seamless data logging and analysis, making it a valuable tool for professionals in environmental science, HVAC, and industrial maintenance.