Digital Aquatics

Digital Aquatics Lifeguard v2.0 Aquarium Monitor


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Not ready for a controller? Protect your tank with Lifeguard™ by Digital Aquatics.

Reliable monitoring and protection. Digital Aquatics’ Lifeguard™ monitoring system protects your aquarium by monitoring the three parameters that most often lead to tank crashes: temperature, pH and water level (via a switch input). Lifeguard is a super-easy-to-use alternative for anyone who wants to protect their tank without using a controller.

Affordable and integrated. Lifeguard is the only tank protection system that includes built-in pH measurement and built-in Ethernet at such a low price. Lifeguard comes with everything you need –including probes and cables – to monitor pH, temperature and one or more switch devices. Lifeguard comes with a pH probe, a temperature probe and a cable for the switch input. Lifeguard also comes with a power adapter, a quick-start guide and an Ethernet cable for connection to your home or office network and the Internet. The switch cable can be connected to a float switch, a leak detector, or multiple switch devices in series or parallel.

Advanced data logging and graphing help you spot trends. Lifeguard’s advanced data logging and graphing features enable you to spot temperature and pH trends. Spotting trends helps you prevent harmful conditions and take better care of your aquarium.

Lifeguard 24-hour Graph
Monitor your aquarium from anywhere, anytime. Built-in Ethernet connectivity enables you to access Lifeguard’s monitoring and graphing features from the Internet. It’s like having your aquarium with you, anywhere, anytime.

Email alerts keep you informed. Lifeguard helps you respond quickly to out-of-bounds tank conditions by sending you email alerts when temperature or pH crosses user-definable thresholds, or when the switch input opens or closes.

New v2 features make Lifeguard even more powerful. Our new v2 firmware makes Lifeguard an even more powerful tool for monitoring and protecting your aquarium.
  • Alert emails can now identify which Lifeguard unit sent the email –great for users with multiple Lifeguard units.
  • Significantly Improved pH and temperature measurement stability throughout the measurement ranges
  • Greatly improved pH calibration algorithm
  • Improved alert e-mail hysteresis - this prevents Lifeguard from sending too many e-mail alerts if the measurement value is fluctuating about the trigger points.
  • Improved long-term graphing performance.
Easy to set up. Easy to use. Lifeguard’s intuitive user interface makes the system a breeze to use. The included quick-start guide and easy-to-use online user guide (free download – see below) will help you get your Lifeguard system up and running quickly and easily.

Redundancy for controlled aquariums. Already have a controller on your tank? Lifeguard adds an affordable level of redundancy to help you protect your investment in your aquarium. For maximum protection, Lifeguard operates independently of any other controller or aquarium device.

Lifeguard Technical Data
  • 80 MHz, 32 bit, 1.56 DMIPS/MHz embedded processor
  • 4 MB, 86 MHz flash memory

  • 16x2 Alphanumeric screen with white backlight and black characters
  • High-contrast for improved readability

Data Calculations and Graphing
  • Two week data logs for temperature
  • Two week data logs for pH
  • 5 minute logging interval
  • Calculated min, max, average and current trend

  • Built-in 10/100 Base-T Ethernet
  • Built-in dedicated web server
  • SSL email support for secure alert transmission

Website Technology
  • Utilizes HTML5 and jQuery for a superior intuitive interface
  • SSL support
  • Smartphone compatible graphs
  • SNTP support for Internet time synchronization

Data Calculations and Graphing
  • Two week data logs for temperature
  • Two week data logs for pH
  • 5 minute logging interval
  • Calculated min, max, average and current trend

  • 6 VDC power adapter
  • Internal battery for clock retention
  • Less than 2.4 W of power consumption

  • Temperature port:
      Precision: 0.1 °F
      Accuracy: +/- 1.0 °F
      Range: 60 °F to 100°F
  • pH port:
      Precision: 0.01 pH
      Accuracy: +/- 0.1 pH
      Range: 3.00 pH to 11.00 pH
  • Advanced switch port
  • USB
  • Ethernet
  • Power adapter, 6VDC

Product Manuals & Documentation

Digital Aquatics Lifeguard v2.0 Aquarium Monitor

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

Digital Aquatics Aquarium Supplies
Digital Aquatics was founded in 2004 and has quickly become the most recognized name in aquarium automation. Since the company debuted the original ReefKeeper 1 (now known as the RK1) in 2004, they have gone on to create some of the most flexible, innovative and cost effective aquarium controllers on the market. The revolutionary ReefKeeper Elite (RKE) was unveiled in 2008 and the affordable ReefKeeper Lite (RKL) came out shortly thereafter to appeal to more budget-conscience aquarium hobbyists. In 2010, Digital Aquatics released a reptile version, the HerpKeeper, as well as the aptly named PondKeeper. ReefKeeper controllers simplify aquarium keeping duties by monitoring and controlling a variety of water parameters and equipment including but not limited to lighting, water flow, heating, cooling, pH and ORP.

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Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.

A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.

We are unable to accept returns of Digital Aquatics, Neptune Systems, Vertex Aquaristik, Aqua Illumination (AI), EcoTech Marine, GHL, or Seneye products once the manufacturer's packaging seals have been broken.

Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.

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