Calibration Buffer Solution pH 4.01 100ml

What is pH:-
pH is the measurement of the concentration of free hydrogen ions in a liquid. The pH of pure water is 7. Liquids having a larger concentration of hydrogen ions than water are acid and have a pH-value of less than 7. Liquids with a lower concentration of hydrogen ions, on the other hand, are base and have a pH value higher than 7. The pH scale runs from 1 to 14.
Maintaining a pH-meter:-
Your pH-meter is a precision instrument. Proper use and appropriate maintenance are important if you are to enjoy it for a long time. Here are some things to look out for:
When you buy it the electrode is usually dried out. Start by letting it soak in the storage solution for 4 hours. Also fill the cap that slides over the electrode with the same storage solution after use. In this way your electrode will keep on working properly for much longer.
To take a measurement the pH meter must first be calibrated. The buffer solution can be used to do this. If the pH meter can only be calibrated at 1 point, use the buffer solution that is closest to your normal readings.
During calibration watch out that no ‘contamination’ of the buffer solution occurs – so never stick the electrode directly into the bottle, but instead pour a small quantity into a separate beaker and take the measurement in that. After calibration, pour the used beaker away and do not return the liquid back into the bottle!
You should preferably never touch the electrode – certainly not with your fingers. If you want to clean the electrode, do so only with a soft cloth without rubbing.

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Delivery / Returns

Larsen HomeBrew(UK) Ltd / T/A The Home Brew Shop Delivery Information.

Due to the UK not being part of the EU we no longer offer any shipping to the EU.

We offer 24-hour and 48-hour Parcel Services, but this does not guarantee that the parcel will be received within this timeframe.

Normal delivery times are on average between 1-3 working days. But sometimes this can be longer During busy times

Heavy Parcels those over 1.5kg are delivered by Parcel Force or DHL

For those under 1.5kg We use Royal Mail 48 hour tracked service

if a problem happens with the delivery please let us know and we will do our best to help, we can talk to Parcel Force or DHL to help solve the problem.

We only know of the problem if you tell us about the problem, we can't help if we are not told about the issue.

1st orders with us, parcels will not be left with out a signature OR if we think they are a high value order over £120 parcels will need to be signed for.

Home Brew UK Delivery

Mainland UK, Order weight Under 1kg = £3.30 + VAT = £3.96
Mainland UK, order value Over £72 = FREE DELIVERY
Mainland UK, order value Under £72, But order weight Over 1kg = £6.25 + VAT = £7.50

Saturday delivery to mainland UK £21.25 + VAT = £25.50 (we must have the order by, 2pm Friday)
Some postcodes we can't send on Saturday Delivery like AB 51

Homebrew delivery for Highlands & Islands

Parcels are only sent on a 48 hour service, Sorry we can't offer a weekend delivery

Parcel Force Zone's 2 & 3 = AB31-56, FK17-21, HS, IV, KA, KW, PA,PH, ZE, IM, TR
Under 1kg £3.30 + VAT = £3.96
1kg - 27kg = £12 + VAT = £14.40
27kg - 54kg = £24 + VAT = £28.80
54kg - 81kg = £36 + VAT = £43.20
81kg - 108kg = £48 + VAT = £57.60

Homebrew delivery for Northern Ireland

Parcels are only sent on a 48 hour service, Sorry we can't offer a weekend delivery BT Post Codes

Northern Ireland order weight Under 1kg = £3.30 + VAT = £3.96
Northern Ireland order weight 1kg - 27kg = £12 + VAT = £14.40
Northern Ireland order weight 27kg - 54 kg = £24 + VAT = £28.80
Northern Ireland order weight 54kg - 81 kg = £36 + VAT = £43.20

Homebrew delivery for Channel Islands - Jersey and Guernsey

Parcels are only sent on a 48 hour service, Sorry we can't offer a weekend delivery Channel Islands Post Codes

Under packed order weight 1kg = £3.30 ( No Vat)
Order weight is 1kg - 25kg = £18.00 ( No Vat), 2 day service
order weight is 25.00kg - 50kg = £36.00 ( No Vat), 2 day service
order weight is 50.00kg - 75kg = £54.00 ( No Vat), 2 day service