HTC-1 Digital Temperature Hygrometer Humidity Meter with Large LCD Display, Clock & Alarm - Desktop Weather Station

Specifications:

• Temperature Range: -50°C to +70°C (-58°F to +158°F)
• Temperature Accuracy: ±1°C (1.8°F)
• Temperature Resolution: 0.1°C (0.1°F)
• Humidity Range: 10% to 99% RH
• Humidity Accuracy: ±5% RH
• Humidity Resolution: 1%
• Display: Large multi-function LCD
• Clock: 12/24 hour selectable with Alarm and Calendar
• Memory: Min/Max temperature and humidity recording
• Power: 1.5V AAA Battery (Included)

Key Applications

• 3D Printing Labs: Monitor ambient humidity to prevent filament moisture absorption.
• Server Rooms: Ensure optimal cooling and prevent static-inducing low humidity.
• Greenhouses: Maintain perfect growth conditions for sensitive plants.
• Dry Boxes: Verify the effectiveness of silica gel in camera and lens storage.
• Home Automation: Provide a visual reference to calibrate your smart home sensors.

Project Evolution

• The Past: You’ve likely used the DHT11 or DHT22 sensors with an Arduino to build a basic logger. While great for code, those sensors often drift and require constant polling.
• The Upgrade: The HTC-1 is a "Set and Forget" solution. It provides a dedicated, low-power visual dashboard that stays on 24/7. This allows you to focus on your R&D while having a persistent environmental reference to compare against your sensor data.
• Effort Level: Beginner. No wiring required—just pop in the battery.

Virtual Technician & User Guide

• Switching Units: Press the black button on the back to toggle between Celsius and Fahrenheit.
• Memory Clear: Press the 'Memory' button to see Max/Min values, hold for 2 seconds to reset the records.
• Setting the Time: Hold 'Mode' for 2 seconds until the minutes flash, then use 'Adj' to change values.
• Warning: Keep out of direct sunlight to prevent LCD bleaching and inaccurate temperature readings.

Downloads:

• HTC-1 Digital Hygrometer Thermometer Humidity Meter - User Manual

Package Includes:

• 1 x  HTC-1 Digital Hygrometer Thermometer Humidity Meter with Large LCD Display, Clock & Alarm - Desktop Weather Station

Frequently Asked Questions (FAQ)

1. How accurate is the humidity sensor?
   It is accurate within ±5% RH, which is the industry standard for consumer-grade meters.
2. Does it measure negative temperatures?
   Yes, it measures down to -50°C, making it suitable for freezer monitoring.
3. Can I change the temperature to Fahrenheit?
   Yes, there is a toggle button on the back of the unit.
4. How do I reset the Max/Min values?
   Press and hold the 'Memory' button for 2 seconds.
5. Is there a backlight for night viewing?
   No, it uses a standard LCD for maximum battery efficiency.
6. Can it be used in a high-humidity greenhouse?
   Yes, but ensure the unit is protected from direct water spray.
7. How long does the battery last?
   Typically 8-12 months with a standard alkaline battery.
8. Is the sensor internal or external?
   The HTC-1 has an internal sensor; the HTC-2 (separate model) has an external probe.
9. Can the clock show 24-hour time?
   Yes, it is user-selectable in the settings.
10. Does it beep every hour?
    There is an optional hourly chime that can be toggled on or off.
11. What is the refresh rate of the display?
    It updates the temperature and humidity every 10 seconds.
12. Will direct sunlight damage the screen?
    Prolonged exposure can fade the LCD; it is best kept in shaded areas.
13. Is the AAA battery included?
    Yes, Probots includes a battery so it's ready out of the box.
14. Can I calibrate it manually?
    The calibration is set at the factory and cannot be manually adjusted.
15. Does it have a stand?
    Yes, it features a fold-out desk stand and a wall-mount hole.
16. Why does it show "LO" for humidity?
    This occurs when the relative humidity drops below 10%.
17. Is it suitable for 3D filament storage boxes? Absolutely, it is the most popular tool for monitoring filament dry boxes.
18. Can the alarm be set for specific days?
    No, the alarm is a daily repeat until disabled.
19. What happens if the screen becomes faint?
    This is the indicator to replace the battery.
20. Is this original HTC brand?
    This is a ProMax HTC-1, manufactured to our specific quality standards.