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Measure temperature and humidity in various environments accurately with this professional pen-style meter from General Tools. With a broad range of 20% to 100% RH and accuracy of +/-3%, it's perfect for HVAC technicians, DIY enthusiasts, and environmental professionals. Its durable construction can withstand harsh conditions, making it ideal for both indoor and outdoor use. Easily record data and track trends over time. Improve overall air quality and identify potential mold growth areas. Don't let unpredictable weather take you by surprise invest in the PTH8707 Temperature Humidity Meter Pen today!