Thermo-Hygrometer
Extech RHT510 Thermo-Hygrometer & Psychrometer
Fast-response environmental diagnostics for professional indoor air quality and HVAC/R optimization.
The Extech RHT510 is a precision diagnostic instrument engineered for facility managers, HVAC/R technicians, and indoor air quality (IAQ) auditors who require immediate and accurate environmental data. Beyond standard temperature and relative humidity measurements, this advanced thermo-hygrometer automatically calculates Dew Point and Wet Bulb temperatures. These critical metrics empower technical teams to quickly diagnose moisture intrusion, assess mold risk, and calibrate building climate control systems for maximum efficiency.
Designed for operational ease in the field, the RHT510 features a rugged, ergonomic housing and a high-visibility dual display, making it a reliable standard-issue tool for daily environmental audits and system balancing.
Key Technical Capabilities
Comprehensive Psychrometric Data: Simultaneously measures relative humidity and ambient temperature while directly computing Dew Point and Wet Bulb parameters without the need for manual chart cross-referencing.
Fast-Response Sensor Technology: Utilizes a highly sensitive capacitance humidity sensor to deliver rapid, stable readings, essential for moving quickly between varied climate zones in a facility.
High-Visibility Dual Display: Features a large, backlit LCD screen that clearly presents both the primary temperature/humidity reading and the calculated psychrometric data simultaneously.
Essential Diagnostic Functions: Equipped with Data Hold to freeze measurements during awkward inspections, alongside Min/Max recording to track environmental extremes over a specific evaluation period.
Optimized for Field Use: Includes an automatic power-off function (with a disable option) to preserve battery life, and a built-in tripod mount for hands-free stability during extended spot-monitoring.
Technical Specifications Summary
| Parameter | Measurement Range | Basic Accuracy |
| Relative Humidity | 10% to 95% RH | ±4% RH |
| Air Temperature | 0°C to 50°C (32°F to 122°F) | ±1.2°C (±2.5°F) |
| Dew Point | -25.3°C to 49.0°C (-13.5°F to 120.1°F) | Calculated |
| Wet Bulb | -5.4°C to 49.0°C (22.2°F to 120°F) | Calculated |
Upgrade your environmental assessment capabilities with rapid, calculation-free psychrometric data