Lab-grade EC/TDS/Salinity/Resistivity measurement built for daily field use in commercial cultivation.
The Apera SX713 (AI475) is a dedicated handheld conductivity/TDS/salinity/resistivity meter kit engineered for lab-grade accuracy in field conditions. Built on Apera's proprietary BPB platinum black electrode with a wide 0–200 mS/cm measurement range, IP57 waterproofing, and automatic temperature compensation — this is the instrument for operators who need reliable, repeatable nutrient solution data across every reservoir, tank, and feed point.
The Apera SX713 (SKU AI475) is a handheld, field-grade meter dedicated to four interrelated water quality parameters: electrical conductivity (EC), total dissolved solids (TDS), salinity, and resistivity — plus integrated temperature measurement. It belongs to Apera's SX700 handheld series, which positions these instruments between simple pocket testers and full benchtop analyzers: portable enough to carry through a cultivation facility, accurate enough to stand behind compliance and QA records.
The meter's core is Apera's proprietary BPB (Brush-Resistant Platinum Black) conductivity sensor. This electrode technology minimizes polarization at the electrode surface, extends the usable measurement range across the full 0–200 mS/cm span, and holds tighter accuracy than conventional stainless steel electrodes — especially important for the high-EC nutrient solutions common in dense commercial cannabis production. The kit ships complete in a rugged carrying case with the electrode, calibration standards, and everything needed for immediate deployment.
Any licensed cannabis or hemp cultivation operation running a recirculating or drain-to-waste hydroponic system needs a reliable, handheld EC meter on the floor — not just inline sensors on a controller. The SX713 fills that role. It's the instrument a head grower or cultivation tech uses to spot-check reservoir EC before a feed cycle, verify inline sensor accuracy, pull readings at multiple canopy zones, or troubleshoot runoff EC on individual beds.
It's equally at home in a coco/rockwool facility pushing 4–6 EC nutrient solutions as it is in an RO or near-distilled water source-water verification scenario. The wide 0–200 mS/cm range means one meter handles everything from ultra-low source water (µS/cm range) to concentrated nutrient stock solutions without needing a range change. Operations with multiple rooms, multiple cultivars, or multiple IP water profiles will benefit from a dedicated handheld that doesn't share duty with pH or DO — keeping readings clean and operator workflow simple.
BPB Platinum Black Electrode: Apera's proprietary brush-resistant platinum black sensor delivers ±1% F.S. accuracy across the full conductivity range with minimal polarization and straightforward field cleaning. Digital filter technology built into the SX700 platform enhances response time and stabilizes readings in variable or electrically noisy grow room environments.
Automatic electrode recognition means the meter auto-identifies the connected probe and switches to the correct parameter mode — no manual configuration required. Auto Temperature Compensation (ATC) runs from 0–50°C, with non-linear ATC activating below 10 µS/cm for improved accuracy when measuring RO or near-pure source water. One-point auto calibration recognizes up to 8 conductivity standard solutions, and a self-diagnosis function flags electrode problems and walks the operator through corrective steps rather than just showing an error code.
Data logging stores and recalls up to 400 measurement sets, supporting facility recordkeeping, regulatory documentation, and batch-level QA without connecting to a PC in the field. The IP57 waterproof and dustproof structure handles the humidity, condensate, and occasional direct water exposure that are standard conditions in any active grow room. The complete kit ships in a rugged carrying case including the electrode, calibration solutions, and accessories — ready to deploy the same day it arrives.
In a commercial build, inline EC sensors on irrigation controllers give you automated monitoring at the injection point. The SX713 serves the verification and spot-check layer that automation can't cover: confirming that what the controller reads matches what's actually hitting the root zone at multiple table positions, catching sensor drift before it compounds into a crop-wide issue, and pulling recorded data that stands behind compliance or GAP audits.
For facilities running an integrated pest management or fertigation SOPs, having 400 logged data sets on a handheld means technicians can document every manual check without transcription to paper logs. The meter switches seamlessly between EC, TDS (ppm), salinity (ppt), and resistivity from a single electrode — operators working across different departments or facilities that report in different unit conventions don't need separate instruments. Pair it with Apera's SX711 (pH) or SX712 (ORP) handhelds from the same series to build a matched field testing kit across all critical water quality parameters, with identical interfaces and compatible carrying cases.
| Model | SX713 |
| SKU | AI475 |
| Parameters | Conductivity (EC), TDS, Salinity, Resistivity, Temperature |
| EC Measurement Range | 0–200,000 µS/cm (0–200 mS/cm) |
| EC Accuracy | ±1% F.S. |
| Electrode Technology | BPB (Brush-Resistant Platinum Black) |
| Auto Temperature Compensation (ATC) | 0–50°C (non-linear ATC below 10 µS/cm) |
| Calibration | 1-point auto calibration; recognizes up to 8 conductivity standards |
| Data Logging | 400 measurement sets, storable and recallable |
| Ingress Protection | IP57 waterproof and dustproof |
| Kit Contents | SX713 meter, BPB conductivity/temp. electrode, calibration solutions, rugged carrying case |
No. The SX713 is a dedicated conductivity/TDS/salinity/resistivity meter. It does not measure pH or ORP. If you need pH alongside EC, look at the Apera SX731 (AI467) — the 7-in-1 multiparameter handheld in the same series that adds pH and ORP to all the EC parameters the SX713 covers. For facilities that want independent, dedicated meters per parameter (which many commercial QA protocols prefer), pair the SX713 with the SX711 pH handheld.
The SX713 is a lab-grade handheld instrument in a larger form factor with a detachable, replaceable BPB electrode, 400-set data logging, digital filter technology, self-diagnosis, and an IP57-rated housing built for harsh field environments. Pocket testers like the EC60 are compact, single-hand tools suited for quick checks in less demanding conditions with a narrower feature set and smaller data management capability. For a licensed commercial operation where readings are part of SOPs and records, the SX713 is the appropriate tier.
Conductivity readings shift with solution temperature — warmer water reads higher EC even at the same dissolved solids concentration. The SX713's ATC automatically corrects all readings to a standard reference temperature (typically 25°C) across the full 0–50°C range. Below 10 µS/cm, a non-linear ATC algorithm kicks in for improved accuracy in near-pure water. In a cultivation context, this matters when you're measuring reservoir water at different temperatures across a day or comparing readings between a cold source water line and a warm recirculating reservoir — ATC ensures the numbers are apples-to-apples.
The SX713's auto calibration system recognizes up to 8 common conductivity standard solutions. Calibration solutions are included in the kit. For commercial grow operations, calibration frequency depends on use intensity and the accuracy demands of your SOP — many facilities calibrate before each measurement session or daily. The self-diagnosis function will flag when calibration is off or the electrode condition has degraded, so you're not relying on guesswork.
Yes — the BPB conductivity/temperature electrode is replaceable, which means when the probe ages, you replace the electrode rather than the entire instrument. Apera covers the SX713 meter body with a manufacturer's warranty (instrument and probe warranty periods are specified in Apera's warranty documentation — contact HSC for current warranty terms). The instrument is CE certified and built to Apera's established quality standards from their Columbus, Ohio operations.
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