(360) 800-5535 · Mon–Fri 9am–5pm PST
Earn 89 points for shopping and get $0.89 off your next order. Join Harvest Club for free.
Questions? Talk to a specialist.
Mon to Fri, 9am to 5pm PST
We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
A conductivity probe can silently drift out of accurate range without any obvious sign, throwing off EC and PPM readings across your whole nutrient program. Bluelab 2.77 EC Conductivity Standard Solution solves this by giving you a known reference point to check your probe's accuracy against, so drift gets caught before it affects your feeding schedule.
Testing against the 2.77 EC standard regularly, especially after cleaning your probe, helps confirm readings are still on target and keeps your EC/PPM accuracy dependable over time. It's a fundamental part of any grower's maintenance toolbox, whether you're running a single handheld meter or a full commercial monitoring setup.
Sold exclusively in box-of-6 case packs, available in 250ml (8.4fl.oz.) or 500ml (16.9fl.oz.) bottle sizes — choose the size that matches your usage and restocking needs from the size selector.
A known 2.77 EC reference point catches drift in tools like the Bluelab Truncheon Meter early.
Testing after cleaning confirms your probe is still accurate.
Available in 250ml and 500ml bottle sizes, sold by the case.
| Option | Volume |
|---|---|
| Case Pack | Box of 6 — 250ml / 8.4fl.oz. bottles |
| Case Pack | Box of 6 — 500ml / 16.9fl.oz. bottles |
It's a known reference solution used to check your conductivity probe's accuracy, helping you catch drift before it affects your EC/PPM readings.
Testing regularly, especially right after cleaning your probe, helps confirm your readings are still accurate.
It's sold in box-of-6 case packs, available in either 250ml or 500ml bottle sizes; for portable testing, we also offer the Bluelab Solution Sachet Box.
It's used to verify accuracy rather than calibrate the probe directly — think of it as a check to confirm your probe is still reading correctly.
No — this solution is now sold exclusively in box-of-6 case packs, available in 250ml or 500ml bottle sizes.
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
Equipping home growers, craft producers, and commercial operations across North America since 2016.
