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Red Sea Refractometer - R12018

Red Sea Refractometer - R12018

Red Sea’s Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC/77 0F.

Regular price
£39.99
Sale price
£39.99
In Stock

Spread the cost with 0% finance

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Product Description

Red Sea’s Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC/77 0F.

Most refractometers used within the aquarium hobby are not specifically designed for reef aquariums and use an algorithm for the measurement of brine (NaCl – rather than seawater) and at a temperature of 15oC/59 0F rather than 25oC/77 0F. Thus, a measurement deviation of up to 1.5ppt is possible, which can have a significant adverse effect on coral growth and coloration.

Main features of Red Sea’s Seawater Refractometer include:

• Directly reads the absolute salinity of seawater at 25°C/77 0F ( No need for seawater or temperature compensation factors)
• Specifically designed for the ionic content of seawater (NSW) for more accurate salinity measurement (industry standard refractometers are calibrated for salt brine ).
• Calibrated for seawater (NSW) at 25oC/77oF, the normal temperature range for reef aquariums
(most standard refractometers are calibrated at 15oC/59oF ).
• Easier to read, higher resolution display, focussed to the relevant range for reef aquariums of up to 40ppt
• Includes Integrated Automatic Temperature Compensation (ATC) for accurate measurement at standard ambient temperature.

Red Sea’s Refractometer display:

The PPT scale on Red Sea’s Seawater refractometer is calculated using an algorithm for seawater and therefore will give a reading of the Absolute Salinity of seawater.

The PPT scale on regular salinity refractometers are calculated using an algorithm for Brine. Using a Brine refractometer for Seawater will give an error of approximately 1.5ppt in the salinity reading.

About Salinity:

Salinity is a general term describing the concentration of salt in water. However, solutions of different type of salts have different refractive indexes.
Brine is a solution of Sodium Chloride (table salt) that contains 2 chemical elements.

Seawater contains approximately 70 chemical elements that include Calcium, Magnesium, Potassium etc. in addition to the Sodium Chloride.
Seawater and Brine of the same salinity (i.e. the same weight of salt/liter) have different refractive indexes and will give different salinity readings if measured on the same refractometer.

Refractive index and temperature:

The refractive index of liquids change with temperature and therefore has a major effect on measuring salinity with a refractometer.

The algorithm for defining the PPT (and S.G.) scale for a refractometer is calculated for a specific temperature.

PPT readings from refractometers that are not calibrated for reef aquariums (i.e. 25oC) need to be adjusted according to a conversion table to give the actual PPT at the aquarium temperature. This is often a cause for misinterpretation of refractometer readings.

For example, using a seawater refractometer calibrated at 20oC will give a PPT reading that is approximately 1-1.5ppt lower than the absolute salinity of the same water sample at the normal aquarium temperature of 25oC.

Therefore, Red Sea’s Seawater Refractometer calibrated at 25°C/77 0F directly reads the absolute salinity of seawater with no need for temperature compensation factor)

This video has been produced by Red Sea:

Finance

We act as a credit broker and not a lender and can introduce you to Close Brothers Retail Finance. Terms and Conditions apply. Finance subject to status. Applicants must be 18 or over and resident in the UK. Finance provided by Close Brothers Retail Finance, a trading style of Close Brothers Limited – a subsidiary of Close Brothers Group Plc. Registered Office: 10 Crown Place, London, EC2A 4FT.

Example Finance Packages:

Option 1 - 10% Deposit: Red Sea Max S-400 Series LED in Black

Sales Price: £3,499
Deposit @ 10%: £349.90 to pay
Monthly Installment: £262.42
Amount of Credit: £3,149.10
Monthly Payments: 12
Interest Paid: 0%

Option 2 - 20% Deposit: Red Sea Max S-400 Series LED in Black

Sales Prices: £3,499
Deposit @ 20%: £699.80
Monthly Installment: £233.26
Amount of Credit: £2,799.20
Monthly Payments: 12
Interest Paid: 0%

For more information about Finance available at Aquacadabra, CLICK HERE

Delivery & Returns

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us (stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.

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