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Multifunction Astronomical Timer

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Multifunction Astronomical Timer REV-303

Novatek Electro India’s REV-303 is a microprocessor-based programmable timer designed to automate electrical loads (like street lights, pumps, or HVAC) based on both real-time schedules and the movement of the sun.

How it Works

Unlike traditional timers that require a physical light sensor (LDR), the REV-303 uses “astronomical logic.”

  1. Coordinate Entry: You input the geographical coordinates (latitude and longitude) and the current time/date of your location.
  2. Solar Calculation: The internal microprocessor runs an algorithm to calculate the exact sunrise and sunset times for every single day of the year.
  3. Load Control: It triggers its internal 16A relay based on these calculations. For example, you can program it to turn lights on exactly at sunset and off 30 minutes before sunrise.
  4. Offset Capabilities: It allows for “time shifts” (e.g., turn on 15 minutes after sunset) to account for local twilight conditions or specific energy-saving needs.

Key Features

The REV-303 is highly regarded for its versatility and industrial-grade build.

  • Four Operational Modes:
    • Astronomical: Follows the sun’s cycle.
    • Weekly: Unique schedules for different days of the week.
    • Daily: A repeating 24-hour cycle.
    • Simple: Basic on/off functionality (like a standard relay).
  • High Event Capacity: It can store up to 500 independent events across two separate programs.
  • Graphic OLED Display: Unlike basic timers with segment LCDs, the REV-303 features a clear graphic display for easier menu navigation.1
  • Broad Power Supply: It operates on a wide range of voltages, from 24V to 265V AC/DC and 8 to 24V DC, making it compatible with almost any power system.
  • Battery Backup: The internal calendar and clock are designed to run for up to 6 years without external power, ensuring you don’t lose settings during a blackout.
  • Password Protection: Settings can be locked with a PIN to prevent unauthorized tampering.

How it Differs from Other Astronomical Timers

While many astronomical timers exist in the market, the REV-303 stands out in several ways:

Feature Standard Astronomical Timers Novatek REV-303
Hybrid Modes Usually just Astronomical or Weekly. Combines all four (Astro, Weekly, Daily, Simple).
Memory Typically, 20–50 events. 500 independent events.
Power Input Often fixed (e.g., 230V AC only). Universal 24V–265V AC/DC and 8–24V DC
User Interface Often complex button sequences/LCD. Intuitive Graphic OLED menu.
Precision Minute-level accuracy. Accuracy down to 0.1 seconds (in simple mode).
Durability Standard consumer/commercial grade. Industrial-grade with 10-year data retention.