Brand new, no box. The monitor and ph probe are new and never been used. Tested and works. All that\'s missing is the box with sample calibration packs and plug adapters for other countries.(not needed)

Bluelab Guardian Monitor - pH EC TDS PPM Continuous Read Meter - Blue Lab . Condition is New. Shipped free with USPS Priority Mail.

The Bluelab Guardian Monitor reads and displays consistent pH, PPM, EC, 

TDS, Conductivity, & Temperature from an easy to read display digital screen.

 In just one glance the Bluelab Guardian Monitor measures three critical 

parameters, thus for a successful grow, pH, conductivity, 

also, temperature.

Details

Bluelab Guardian Monitor Consistent pH, PPM, EC, TDS Meter & Temperature Tester

In just one glance the Bluelab Guardian Monitor measures all three critical parameters for successful growth pH, conductivity, and temperature.

The Bluelab Guardian Monitor is a constant indicator of the desired levels of EC/ppm 500/700/TDS/CF, pH, and temperature, enabling the grower to optimize these parameters as the crop progresses through each growing phase. The Bluelab Guardian Monitor is mounted to the wall or hung on a support, while the probes placed into the reservoir. 

With the Bluelab Guardian Monitor monitoring your crops 24 hours a day and with the ability to set high and low alarms, a flashing display lets you know if one parameter moves away from the ideal, allowing you to make the required adjustments quickly and efficiently.

Adjustable brightness display.

Large easy to read, Plant Safe green LED display.

There are selectable values for PPM, TDS, conductivity, and temperature.

Simple: Push button pH calibration system.

No calibration required for conductivity and temperature.

Silent alarm for both high and low settings.

Settings retained when power lost (non-volatile memory).

Temperature compensation.

An international power supply.

Water resistant design.