The Gro’Star Series is Apera’s dedicated horticulture line — Gen II lab-grade pen testers purpose-built for growers. Every model features IP67 waterproof construction (floatable), 3-color backlit LCD for dark grow rooms, replaceable probes, and TruRead™ mode that averages readings across multiple sample points for true accuracy.
Drop it in the reservoir — it floats. Fully submersible and sealed for the harshest grow room conditions. No more replacing meters after accidental dunks.
Takes measurements across multiple points, then automatically calculates and displays average, minimum, and maximum values. True accuracy, not a single-point guess.
Never throw away the whole pen. All Gro’Star models use replaceable probes that snap in. The instrument lasts for years; just replace the sensor when needed.
White for measurement, green for calibration, red for errors. Instantly readable in dark grow rooms. No squinting at screens under HPS or green light.
ISO 9001 certified facility in Columbus, Ohio. In-house sensor manufacturing across 60+ countries. 2-year instrument warranty, 1-year probe warranty on Gro’Star.
Both 500-scale and 700-scale ppm modes built in. Compatible with any nutrient brand’s feed chart — no conversion math needed.
Every Apera meter and tester we carry, grouped by series. Click through for specifications and images.
| Instrument | Measures |
|---|---|
| Pocket pH Tester Kit › AI3711 |
pH |
| Pocket Conductivity/TDS/Salinity/Resistivity Tester Kit › AI3718 |
EC, Resistivity, Salinity, TDS |
| Pocket Flat pH Tester Kit › AI3715 |
pH |
| Pocket ORP TesterKit › AI3717 |
ORP |
| Pocket pH/Conductivity/TDS/Salinity/Resistivity Tester Kit › AI3719 |
EC, Resistivity, Salinity, TDS, pH |
| Pocket pH/Conductivity/TDS/Salinity/Resistivity/ORP Tester Kit › AI3803 |
EC, ORP, Resistivity, Salinity, TDS, pH |
| Pocket Spear pH Tester Kit › AI3713 |
pH |
| Instrument | Measures |
|---|---|
| PH60Z-WW Smart pH Meter Kit for Wastewater and Solids-Containing Solut › AI3737 |
Ion, pH |
| PH60Z-SA Smart pH Meter Kit for Strong Alkaline and High Salinity Solu › AI3743 |
Ion, Salinity, pH |
| PH60Z-HF Smart pH Meter Kit for HF-Containing and Strong Acidic Soluti › AI3745 |
Ion, pH |
| PH60Z-VS Smart pH Meter Kit for Viscous Samples › AI3749 |
pH |
| PH60Z-MS Smart pH Meter Kit for Small-Volume Samples › AI3741 |
pH |
| PH60Z-HT Smart pH Meter Kit for High Temerature and Caustic Solutions › AI3747 |
Ion, pH |
| PH60Z-PW Smart pH Meter Kit for Pure Water › AI3739 |
pH |
| PH60Z-MT Smart pH Meter Kit for Meats › AI3751 |
pH |
| Instrument | Measures |
|---|---|
| PH60-WW pH Meter Kit for Wastewater and Solids-Containing Solutions › AI3721 |
Ion, pH |
| PH60-SA pH Meter Kit for Strong Alkaline and High Salinity Solutions › AI3727 |
Ion, Salinity, pH |
| PH60-HF pH Meter Kit for HF-Containing and Strong Acidic Solutions › AI3729 |
Ion, pH |
| PH60-VS pH Meter Kit for Viscous Samples › AI3733 |
pH |
| PH60-MS pH Meter Kit for Small-Volume Samples › AI3725 |
pH |
| PH60-HT pH Meter Kit for High Temerature and Caustic Solutions › AI3731 |
Ion, pH |
| PH60-PW pH Meter Kit for Pure Water › AI3723 |
pH |
| PH60-MT pH Meter Kit for Meats › AI3735 |
pH |
| Instrument | Measures |
|---|---|
| pH Meter for Dirty Liquid Samples e.g. Wastewater, Suspensions, Emulsi › AI5012 |
Ion, pH |
| pH Meter for Biochemistry Liquid Samples and General Water Solutions, › AI5018 |
Ion, pH |
| pH Meter for Strong Alkaline Solutions and/or High Salinity Solutions › AI5011 |
Ion, Salinity, pH |
| pH Meter for Strong Acidic Solutions (0 to 2 pH) and/or Solutions Cont › AI5013 |
Ion, pH |
| pH Meter for Pure Water and Water Solutions with Low Ionic Strength (& › AI5015 |
Ion, pH |
| pH Meter for High-temperature Liquids (up to 130˚C) and/or Caustic Wat › AI5019 |
Ion, pH |
| pH Meter for Micro-volume (>15 micro liters) Water Solution Samples › AI5017 |
Ion, pH |
| pH Meter for Viscous Liquid Samples e.g. Coatings, Skincare Products, › AI5016 |
pH |
| Instrument | Measures |
|---|---|
| Benchtop pH Meter Kit › AI531 |
Ion, pH |
| Benchtop Conductivity/TDS/Salinity/Resistivity Meter Kit › AI532 |
EC, Ion, Resistivity, Salinity, TDS |
| Benchtop pH/Conductivity/TDS/Salinity/Resistivity Meter Kit › AI533 |
EC, Ion, Resistivity, Salinity, TDS, pH |
| Instrument | Measures |
|---|---|
| EC/500ppm/700ppm Pen Tester Kit › AI103G |
— |
| pH Pen Tester Kit › AI101G |
pH |
| pH/ORP Pen Tester Kit with ORP Probe › AI201G |
ORP, pH |
| pH/EC/500ppm/700ppm Combo Pen Tester Kit › AI104G |
pH |
| pH/EC/500ppm/700ppm/ORP Combo Pen Tester Kit with ORP probe › AI204G |
ORP, pH |
| Soil pH Pen Tester Kit › AI102G |
pH |
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