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Bluelab Conductivity Pen – Waterproof EC, TDS & Temperature Meter | ATC | Made in NZ
Bluelab Conductivity Pen – Waterproof EC, TDS & Temperature Meter
An accurate and reliable conductivity (EC) and temperature pen for serious growers. The Bluelab Conductivity Pen (SKU: PENCON) measures nutrient levels and temperature to help you create the optimal nutrient environment for plant growth. Maintaining the right EC prevents nutrient burn and stunted growth — keeping your crops healthy and your yields high.
Factory calibrated and ready to use straight out of the box. Compact, waterproof, and built to float. Made in New Zealand by Bluelab — trusted by growers worldwide.
Key Features
Multi-Scale EC Display — reads conductivity in EC, CF, PPM 500 (TDS), or PPM 700; compatible with all major growing scales
Automatic Temperature Compensation (ATC) — integrated temperature sensor ensures accurate EC readings regardless of solution temperature
Simultaneous EC & Temperature — reads both parameters at once on a bright backlit display
Temperature in °C or °F — switch between Celsius and Fahrenheit to suit your region
Factory Calibrated — ready to use immediately; no calibration required out of the box
Waterproof & Floats — fully waterproof construction that floats in solution; safe for daily use in reservoirs, runoff trays, and water sources
Compact Handheld Design — ergonomic, pocket-sized form factor for convenient use anywhere in the grow room or field
Bright Backlit Display — easy to read in any lighting condition
Made in New Zealand — decades of Bluelab precision instrument manufacturing behind every Conductivity Pen
Why EC & Temperature Matter
All plants need the right amount of nutrients to grow and thrive. Over- or under-feeding wastes expensive nutrient resources and harms crop quality. Electrical conductivity (EC) measures the total ionic content (dissolved salts) in your solution — the most reliable indicator of nutrient concentration. Temperature is equally critical: a solution that’s too hot or too cold directly affects plant growth rate and structure. The Bluelab Conductivity Pen gives you both measurements instantly so you can keep your grow dialled in.
Ideal For
Hydroponics & indoor growing nutrient management
Aquaponics & aquaculture water quality monitoring
Greenhouse & commercial growing operations
Cannabis cultivation & precision nutrient control
Coco coir, NFT, DWC & recirculating systems
Runoff & water source EC testing
Home growers & professional cultivators alike
Technical Specifications
SKU: PENCON
EC Scales: EC, CF, PPM 500 (TDS), PPM 700
Temperature: °C or °F
Temperature Compensation: Automatic (ATC)
Calibration: Factory calibrated, ready to use
Housing: Waterproof, floats in solution
Display: Backlit LCD
Country of Origin: New Zealand
Weight: 12 oz
Pro tip: Pair the Bluelab Conductivity Pen with the Bluelab pH Pen for a complete nutrient solution measurement system — covering both EC/PPM and pH in one workflow. Together, they give you everything you need to maintain the ideal growing environment.
