HTC HD-304 Humidity & Temperature Meter

HTC HD-304 Humidity & Temperature Meter

The HTC HD-304 Humidity & Temperature Meter is a professional handheld environmental meter designed to accurately measure relative humidity (RH), ambient temperature, dew point, and wet bulb temperature. With a 99-reading data logging capability, large backlit LCD, and fast response time, it is an ideal instrument for HVAC technicians, laboratories, pharmaceutical facilities, warehouses, cleanrooms, agriculture, and industrial quality control applications.  

Key Features

• Simultaneous measurement of Relative Humidity (RH) and Ambient Temperature
• Calculates Dew Point and Wet Bulb Temperature
• Wide humidity measurement range from 0 to 100% RH
• Temperature measurement range from -20°C to 60°C (-4°F to 140°F)
• 99 groups of data logging for recording measurements
• Large backlit LCD display for easy reading in low-light conditions
• Fast response time for real-time monitoring
• Data Hold function for convenient reading
• MAX/MIN value recording
• Auto Power Off (APO) to extend battery life
• Lightweight and ergonomic handheld design

Technical Specifications

Parameter  Specification

Humidity Range : 0 to 100% RH

Humidity Resolution : 0.1% RH

Humidity Accuracy : ±2.0% RH (10–90% RH), ±3.0% RH (0–10% RH & 90–100% RH)

Temperature Range : -20°C to 60°C (-4°F to 140°F)

Temperature Resolution : 0.1°C / 0.1°F

Temperature Accuracy : ±0.5°C (0–45°C), ±1.0°C (-20–0°C & 45–60°C)

Dew Point Range : -50°C to 60°C

Wet Bulb Range : -20°C to 60°C

Data Logging : 99 Readings

Display : Large Backlit LCD

Power Supply : 3 × 1.5V AA Batteries

Dimensions : 184 × 60 × 29 mm

Weight : Approximately 190–200 g

Applications

• HVAC installation and maintenance
• Pharmaceutical and healthcare facilities
• Laboratories and research centers
• Cleanrooms and controlled environments
• Warehouses and cold storage
• Food processing and storage
• Greenhouses and agriculture
• Museums and archives
• Industrial quality control and environmental monitoring

Benefits

• Measures four essential environmental parameters in one compact device.
• High-accuracy humidity and temperature measurements for reliable monitoring.
• Built-in dew point and wet bulb calculations help evaluate condensation and moisture conditions.
• 99-point data logging simplifies inspection, analysis, and documentation.
• Compact, lightweight, and easy to carry for field applications.
• Large backlit display ensures excellent readability in all lighting conditions.
• Automatic power-off extends battery life during extended field use.

Package Contents

• HTC HD-304 Humidity & Temperature Meter
• Hard Carrying Case
• 3 × AA Batteries
• User Manual

The HTC HD-304 Humidity & Temperature Meter is a reliable and feature-rich environmental monitoring instrument, offering accurate measurement of humidity, temperature, dew point, and wet bulb temperature with built-in data logging. Its professional-grade performance and portable design make it an excellent choice for technicians, laboratory professionals, HVAC engineers, and industrial maintenance personnel.