HYDROS Salinity & Conductivity Probe Kit
Buy now, pay later
Split your purchase into smaller payments with the provider you prefer. Pick your plan at checkout.
Checking out with Shop Pay? The Shop Pay screen only offers Shop Pay Installments. To pay with PayPal, Klarna, or Affirm, select Check out as guest to see every payment option, or use the PayPal button in your cart.
Shop Pay Installments
- 4 interest-free payments every 2 weeks on orders from $50 to $999.99
- 2 interest-free payments on orders from $35 to $50
- Monthly plans on orders from $150
- Check out with Shop Pay, then choose an installment plan
Payment options are offered by Affirm and are subject to an eligibility check and might not be available in all states. Monthly plans may include interest (0–36% APR). CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lender license.
Learn more about Shop Pay InstallmentsPayPal Pay Later
- Pay in 4: 4 interest-free payments every 2 weeks on purchases from $30 to $1,500
- Pay Monthly: 3 to 24 monthly payments on purchases from $49 to $10,000
- Select PayPal in your cart or at checkout, then choose Pay Later
Pay in 4 is available to consumers upon approval and is not currently available to residents of MO. Pay Monthly is subject to consumer credit approval, with a fixed APR of 9.99–35.99%. The lender for Pay in 4 is PayPal, Inc. (NMLS #910457). The lender for Pay Monthly is WebBank.
Learn more about PayPal Pay Later
Klarna
- Pay in 4: 4 interest-free payments every 2 weeks on orders of $35 or more
- No interest or fees when you pay on time
- Choose Klarna as your payment method at checkout
Klarna Pay in 4 is subject to approval and isn't available in Hawaii, U.S. territories (excluding Puerto Rico), or for APO/FPO/DPO addresses. Late fees may apply.
Learn more about Klarna
Affirm
- Pay in 4: 4 interest-free payments every 2 weeks on eligible orders from $50
- Monthly plans with rates from 0–36% APR based on credit
- No late fees or hidden fees
- Choose Affirm as your payment method at checkout
Payment options through Affirm are provided by these lending partners: affirm.com/lenders. Your rate will be 0–36% APR based on credit and is subject to an eligibility check. Affirm Pay in 4 is 0% APR. Options depend on your purchase amount and may vary by merchant. A down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Financing Law license.
Learn more about AffirmUPC: 850009641588
Goes well with:
90 Day Returns
Reef Guard Covered
Ships Overnight
Orders Over $399*
Expert Support
We've got your back!
Accurate salinity measurement is one of the most critical parameters in a marine or reef system, and the Hydros Salinity Kit is built to deliver lab-grade conductivity readings without compromise. The kit centers on a high-range conductivity probe with a K=10 cell constant, a range of 20 to 2000 mS/cm, and a POM housing rated for continuous use from 0 to 80°C. The BNC connection interfaces directly with Hydros controllers and compatible conductivity meters, keeping the installation straightforward.
Two-point calibration is the standard for reliable conductivity measurement, and this kit includes everything needed to perform it: 100 mL each of 28 ppt and 35 ppt calibration solutions. Both solutions correspond to salinity levels that bracket the typical reef tank target range, giving you a calibration curve grounded in real-world marine parameters. Follow the calibration procedure outlined in your controller's operation manual to get the probe dialed in before use.
The probe measures 12 x 145 mm with a 3-foot cable, making it practical to position in a sump or dedicated testing chamber. CoralVue recommends pairing the probe with the Hydros iV isolated vessel, which physically separates the water sample from the rest of the system. This isolation eliminates electrical interference from pumps, heaters, and other equipment that can skew conductivity readings — a common source of error in probes placed directly in a crowded sump.
This kit is a natural fit for any aquarist already running Hydros monitoring or automation equipment who wants to bring salinity tracking into the same ecosystem. The Hydros iV isolated vessel is not included but is available separately and strongly recommended for accurate, interference-free readings.
Overview
Calibrate. Measure. Trust.
The Hydros Salinity Kit gives you the probe and calibration solutions needed for accurate, repeatable conductivity measurement in a marine system.
Lab-Grade Conductivity Probe
- High-range probe with K=10 cell constant
- Covers 20 to 2000 mS/cm — well beyond typical reef salinity
- POM housing rated for 0–80°C continuous operation
- BNC connector fits Hydros controllers and compatible meters
Two-Point Calibration Included
- Includes 100 mL of 28 ppt calibration solution
- Includes 100 mL of 35 ppt calibration solution
- Brackets the standard reef salinity target range for a precise curve
- No additional calibration fluids needed to get started
Clean Installation
- 3-foot cable provides flexible positioning in sump or test chamber
- Compact 12 x 145 mm probe fits most cell holders and vessels
- Pairs with the Hydros iV isolated vessel to eliminate interference (sold separately)
- BNC connection is tool-free — twist clockwise to seat
Specifications
HYDROS SALINITY PROBE
- Range
- 20 to 2000 mS/cm
- Operating Temperature
- 0–80°C
- Cell Constant
- K=10
- Housing Material
- POM
- Probe Dimensions
- 12 x 145 mm
- Connection
- BNC
- Cable Length
- 3 ft
CALIBRATION SOLUTIONS
- 28 ppt Solution
- 100 mL
- 35 ppt Solution
- 100 mL