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| PH60 | PH60S | GroStar GS1 | GroStar GS4 | PC60-Z | PH60S-Z |
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| Customer Reviews | | | | | | |
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| Price | $80.66$80.66 | $166.98$166.98 | $99.72$99.72 | $142.89$142.89 | — | — |
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| Measuring parameter(s) | pH, temp., mV (ORP can be measured with an ORP probe installed) | pH, temp., mV (ORP can be measured with an ORP probe installed) | pH, temp., mV (ORP can be measured with an ORP probe installed) | pH, EC, ppm (500ppm/700ppm), temp., mV (ORP can be measured with an ORP probe installed) | pH, temp., conductivity, TDS, salinity, resistivity, ORP (an ORP probe needs to be installed) | pH, temp., ORP (an ORP probe needs to be installed) |
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| Applications | General water solutions e.g. pools and spas, education, aquarium, enviromental monitoring, beverage making, hydroponics, water treatment, etc. | Soft-solid samples e.g. cheese, fruit, sushi rice, soil. Also works well for general water solutions. | Hydroponics, aquaponics, fruticulture, floriculture, aquarium | Hydroponics, aquaponics, fruticulture, floriculture, aquarium | General water solutions e.g. pools and spas, education, aquarium, enviromental monitoring, beverage making, hydroponics, water treatment, etc. | Soft-solid samples e.g. cheese, fruit, sushi rice, soil. Also works well for general water solutions. |
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| Accuracy | ±0.01 pH | ±0.01 pH | ±0.1 pH | ±0.1 pH; ±0.1 EC; ±30 ppm | ±0.01 pH; ±1% F.S | ±0.01 pH |
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| Probe Type | Regular glass bulb with sensor shield | Swiss spear pH probe | Double-junction pH Probe with sensor shield | Double-junction pH and titanium conductivity probe with sensor shield | Double-junction pH + firm platinum black Probe | Swiss spear pH probe |
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| Calibration | Auto. 1 to 3 point calibration (7.00/4.00/10.01) | Auto. 1 to 3 point calibration (7.00/4.00/10.01) | Auto. One-tap 1 to 3 point calibration (7.00/4.00/10.01) | Auto. One-tap 1 to 3 point calibration (7.00/4.00/10.01, 2.77EC) | 1 to 3 points auto. calibration with a choice of 5 pH buffers (1.68, 4.00, 7.00, 10.01, 12.45) | 1 to 3 points auto. calibration with a choice of 5 pH buffers (1.68, 4.00, 7.00, 10.01, 12.45) |
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| TruRead Function | N/A | N/A | ✓ | ✓ | N/A | N/A |
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| Bluetooth Connection to ZenTest App | N/A | N/A | N/A | N/A | ✓ | ✓ |
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| Reading Alarm | ✓ | ✓ | N/A | N/A | ✓ | ✓ |
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| Electrode Condition Indicator | N/A | N/A | ✓ | ✓ | ✓ | ✓ |
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| Calibration Reminder | N/A | N/A | ✓ | ✓ | ✓ | ✓ |
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