Lab-grade pH, EC, TDS, salinity, and resistivity in one IP57-rated field kit.
The Apera SX723 (SKU: AI477) is a portable, 6-parameter water quality meter covering pH, conductivity, TDS, salinity, resistivity, and temperature — purpose-built for field use in demanding cultivation and water treatment environments. Ships as a complete ready-to-test kit in a rugged carrying case with both electrodes, calibration solutions, and all accessories included.
The Apera SX723 handles six discrete water quality parameters from a single handheld unit: pH (–2.00 to 19.99), millivolts (–1999 to +1999 mV), electrical conductivity (0.00 µS/cm to 199.9 mS/cm), TDS (0–100 g/L), salinity (0–100 ppt), and resistivity (0–100 MΩ·cm) — plus automatic temperature compensation throughout. The meter identifies which electrode is connected and switches parameter modes automatically, so there's no manual mode-toggling between pH and conductivity checks.
pH accuracy at the electrometer is ±0.01 pH with 0.01 resolution. Conductivity accuracy is ±1.0% FS at the electrometer across the full 200,000 µS/cm range — a range wide enough to cover RO/DI source water through concentrated nutrient solutions without swapping probes or rescaling. Temperature compensation for conductivity is automatic from 0 to 50°C.
The SX723 carries an IP57 water-resistance rating, meaning it can be fully submerged up to 1 meter for 30 minutes. In a working cultivation facility — reservoir rooms, fertigation bays, wet corridors, greenhouse benching — that's the kind of protection a handheld meter needs daily. The meter body is 65 × 120 × 31 mm and weighs 180 g, runs on two standard AA batteries, and stores up to 400 measurement groups with date/time stamp for record-keeping.
Apera's digital filter technology stabilizes readings faster than a conventional analog circuit, which matters when you're moving between reservoirs or testing multiple zones on a single walk. The self-diagnosis function flags electrode condition issues before they corrupt a measurement, and low-voltage indication prevents an unannounced mid-test shutdown.
The kit ships with two electrodes. The 201T-S pH/temperature combination electrode uses a lithium glass membrane and fiber ceramic junction for fast response and stable readings across general aqueous solutions. The 8-pin connector feeds ATC data directly to the meter; cable length is 1 meter. pH auto-calibration runs 1 to 3 points and recognizes up to 13 standard buffer types automatically — no manual entry required.
The 2301T-S conductivity/temperature electrode uses Apera's proprietary platinum-black sensor (K = 1.0) to maintain ±1% FS accuracy from 0.5 µS/cm through 200 mS/cm without needing a different cell constant probe for different concentration ranges. Conductivity calibration is 1-point automatic, recognizing up to 8 standard conductivity solutions. Both pH and conductivity calibration solutions are included in the kit, so the unit is ready for a first calibration out of the box.
Commercial cannabis and hemp operations running hydroponic or coco-based systems need accurate, repeatable pH and EC readings at source water, mixing, reservoir, and runoff checkpoints. A single-parameter pocket tester at each station works until it doesn't — probe drift, inconsistent calibration, or an undetected salinity swing can quietly stress a canopy for days before it shows. The SX723 consolidates those checkpoints into one calibrated, logged instrument that travels with the grower.
The 400-group data log with recall supports both in-house QC documentation and any chain-of-custody requirements a compliance program may impose. The rugged carrying case keeps both electrodes and calibration solutions organized between uses, and Apera's 3-year instrument warranty (6 months on probes) provides a defined support window for a tool that will see daily use across a full production cycle.
| SKU | AI477 |
| Model | Apera SX723 |
| Parameters Measured | pH, mV, Conductivity, TDS, Salinity, Resistivity, Temperature |
| pH Range / Accuracy | –2.00 to 19.99 pH / ±0.01 pH (electrometer) |
| pH Resolution | 0.01 pH |
| Conductivity Range | 0.00 µS/cm to 199.9 mS/cm (0 to 200,000 µS/cm) |
| Conductivity Accuracy | ±1.0% FS (electrometer) |
| TDS Range | 0–100 g/L |
| Salinity Range | 0–100 ppt |
| Resistivity Range | 0–100 MΩ·cm |
| Data Storage | 400 measurement groups |
| IP Rating | IP57 |
Yes. The kit ships with pH calibration solutions (pH 4.00, 7.00, and 10.01, 50 mL each) and a 1413 µS/cm conductivity standard solution (50 mL). Both electrodes, 2× AA batteries, a screwdriver, and a rugged carrying case are also included — everything needed to calibrate and begin testing immediately.
Yes. The 2301T-S conductivity electrode (K=1.0) covers 0.5 µS/cm through 200,000 µS/cm (200 mS/cm) with ±1% FS accuracy across the full range. That spans ultra-pure water through high-concentration fertigation solutions on a single probe and cell constant.
The SX723 features automatic electrode recognition — it detects which electrode is plugged into the 8-pin port and switches to the appropriate parameter mode without any manual input. Swapping between pH and conductivity checks during a reservoir walk requires only unplugging one electrode and connecting the other.
The meter is IP57-rated, which means it is dust-tight and protected against submersion up to 1 meter for 30 minutes. This covers incidental spray, rinse-down exposure, and drops into shallow sumps — typical wet-room conditions in a cultivation facility.
The meter stores up to 400 measurement groups, each logged with the measured value, unit, and temperature. Stored data can be recalled directly on the meter for spot-checks or documentation review without connecting to a computer.
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