Water Monitor

For hydroponics, laboratories, water-quality monitoring, aquariums, brewing

The Water Monitor is unavailable until further notice.

Measures water temperature, pH, Oxidation-Reduction Potential (ORP), and conductivity/TDS. Battery-powered with long life, or plug in.

We're confident this is the best value in water monitoring you'll find. Accurate enough for laboratory use. Affordable enough for anyone.

Send readings to your PC or Raspberry Pi using the built-in USB port. View on your phone or computer using the open-source readings viewer, or Python library:

Water monitor built-in display

Screenshot from the viewer software

Monitors pH, electrical conductivity, Total Dissolved Solids (TDS), temperature, and Oxydation Reduction Potential (ORP). Available with all, some, or none of these probes. pH, conductivity, and ORP probes use BNC connections, and temperature probes use 3-wire screw terminals.

The temperature sensor is a Pt100 Platinum Resistance Temperature Detector (RTD). TDS measurements are temperature compensated.

Built to last

The Water Monitor is designed to be run for extended periods of time, with little to no maintenance. Its long battery life makes it suitable for use in environments with no nearby electrical outlets.

Easy calibration

Calibration screens use interactive intstructions. Use 2 or 3 point pH calibration, and single-point ORP and conductivity calibration.

Suitable for continuous immersion

Features a 4.2" e-paper display that's clear and readable, even in bright sunlight.

Long battery life, or power with USB-C

Has a 3-week+ battery life using 3 AA batteries (included), or power it with a USB C port, using the included cable and plug. Compatible with rechargeable batteries. Use as a portable meter, or in places without a nearby outlet.

Use as a portable sensor suite, or leave submerged indefinitely.

Built-in hook for wall-mounting. Can be used with 1, or 2 mounting points.

User manual

Updating firmware

Connect to a Raspberry Pi using MyCodo for detailed logging, remote monitoring, and charts.

Hub specifications:

• Dimensions: 100 × 75 × 50(height) mm
• Display: 4.3" e-ink, 400x300 pixels
• Weight: 250 grams
• pH, O2, and EC connectors: BNC Male (Accepts BNC female sensors)
• Temperature connectors: 3x screws / fork
• UPC / GTIN: 860004179016

Temperature sensor specifications:

• Design: Class A Pt100 Platinum Resistance Temperature Device
• Resistance at 0°C: 100Ω
• Measurement Range: 0 - 850°C
• Probe dimensions: 10mm lengh × 1 mm radius
• Cable length: 1 m
• Connector: 3-wire space connectors
• Temperature range: 0-700°C

pH electrode specifications:

• Design: Double junction glass hydrogen-sensitive electrode
• Dimensions: 155 × 12 mm
• Weight: 24g
• Measurement range: 0 - 14
• Outer tube material: Plastic
• Bulb shape: Spherical
• Cable length: 1 m
• Connector: BNC female
• Temperature range: 0-80°C

ORP electrode specifications:

• Design: Double junction glass electrode
• Dimensions: 155 × 12 mm
• Weight: 24g
• Measurement range: ±1500mV
• Outer tube material: Plastic
• Bulb shape: Spherical
• Cable length: 1 m
• Connector: BNC female
• Temperature range: 0-80°C

Conductivity electrode specifications:

• Dimensions: 100 × 75 × 50(height) mm
• Weight: 250 grams
• Constant: K = 1.0
• Measurement Range: 0 - 2,000μS/cm
• Precision: 1 μS/cm
• Temperature range: 0 - 80°C
• Connector: BNC Female

Alternatives

Here are some alternatives to consider, which also provide multi-sensor water monitoring:

• Atlas Scientific Wi-Fi Hydroponics Kit This multi-sensor kit reads pH, conductivity, and temperature. It send readings over WiFi to an IOT service. It's designed for electrical engineers.
• BlueLab Combo Meter This measures pH, conductivity, and temperature, and displays one-at-a-time on a built-in LCD. It combines conductivity and temperature measurements in the same probe, for simplified wiring. Its backlit screen is useful at night.
• labForce PC300 Benchtop pH/Conductivity Meter This high-end bench top meter features advanced calibration features, an LCD display, and IP54 water and dust certifications.