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The LAQUA Twin range of Pocket Meters are quick, accurate and designed for very small sample volumes. Full product descriptions and specifications can be found here There are three very easy steps to operate them:Calibrate after cleaning the sensor with pure waterTesting the sampleCleaning the sensor ready for next use.Auto Buffer / Standard Recognition:Automatically calibrates pH buffers and standardsPre-programmed into the software (Refer to specs.)Avoid errors during calibrationAuto Stable / Auto Hold Measurement:Auto Stable Display live reading (default setting)Auto Hold Lock stable reading;Auto Range:Applicable to EC metersSwitches to appropriate measurement range and unit?Multiplication Compensation:Enter the dilution factor 0.01 9.90 (default value 1.00) into the meter to correct the sample readingAvoid manual computationApplicable to diluted samples and ion meterChangeable Low & High New! Calibration Values:Change default standard solution values to match the concentration(s) of user-prepared standard solution(s) ?Default values: 150 & 2000 ppmApplicable to ion metersTemperature Calibration New!:Applicable to models with temperature displayAdjust the measured temperature to a reference value (e.g., calibrated thermometer)?Temperature Compensation:Automatically correct the reading based on measured temperatureAll sensors have built-in temperature element and metersLow Battery Indicator:Batterywarning appears when the CR2032 batteries need replacementAutomatic Power Off:When the meter is switched on but not in use for 30 minutes,it automatically switches off.The LAQUA is IP67 rated, fully dustproof and waterproof. CE Marked pH Meter & Electrode Selection Which pH meter/electrode do I need?... Making sure you have the right electrode and meter for your application can be confusing, not to mention correct maintenance and what to do if you are having issues. You can find links to our support guides below to help you through the process. If you are after an electrode selector guide for some of our most popular electrodes and what applications they are recommended for you can find that below. Electrode Selector Guide ? ? An introduction to pH pH, put simply is a measure of how acidic or basic a solution is. It is a measure of H+ions present.? pH can be measured in a number of ways including test strips, indicator solution or with a pH meter and electrode. If you want to read more about the pH and the pros and cons of these methods, you can check out our introduction guide here.? How to take a pH reading and care for your electrode pH electrodes require the correct storage and regular calibration. If you have a pH meter or are looking to purchase and need to find out more about the care and maintenance process then you can read our guide here. We also include a troubleshoot sections with the most reported issues and possible solutions.? Selecting the right electrode and meter for your application So you have decided you need to purchase a pH meter with electrode, but with such a wide selection out there, how do you know which is right for you? You can read our guide on the differences between electrodes and what applications different features are good for. We also have an electrode selection guide for some of our most popular electrodes.? Related Products pH Buffers Electrode Storage Solution Electrode Cleaning Solution ? ? If you require any further assistance, or extra information you can request that here and one of our trained technical specialists will be in contact. Please provide as much detail as possible so that we can get back to you with the right information. Request information Servicing Servicing Options Available ? Have you considered your servicing requirements? Much like a car, scientific instruments may need a bit of care to keep them working reliably and at their most accurate. ? The Allschoolabs Service Department have over 60 years experience in scientific instrumentation. We have a number of highly qualified internal and field-based service engineers able to perform a variety of jobs including preventative maintenance servicing and calibration. Allschoolabs can offer yearly service contracts which include two main types of preventative maintenance/calibration services ? the back to base service and an engineer visit to your site. These options are can be offered with differing turn around times depending on the instrument type and your requirements along with loan instruments if available. ? A typical preventative maintenance service includes the following: Inspection and testing of the unit Dismantling, cleaning and inspection of the key parts Correction of minor defects including adjustments if necessary Reassembly and testing Take post adjustment / cleaning readings Supply of calibration certificate Return of the item to you (back to base services) ? Request a quote for your servicing requirements today. Quote Request LAQUAtwin Range ? LAQUAtwin pH Pocket meter with plastic carry-case, 14 ml buffer/standard solutions, 2 x CR2032 batteries, dropper Product Part Number Description LAQUAtwin PH-11 3999960122 PH-11, pH 2-point calibration LAQUAtwin PH-22 3999960123 PH-22, pH 3-point calibration LAQUAtwin PH-33 3999960124 PH-33, pH / temp, 5-point calibration S010 3200459834 Replacement pH sensor for B-21x & B-71x, PH11, PH22, PH33 514-4 3999960108 pH 4.01 buffer solution, 6 x14 ml 514-7 3999960109 pH 7.00 buffer solution, 6 x 14 ml 514-686 3200691954 pH 6.86 buffer solution 14 mL x 6 ? LAQUAtwin CONDUCTIVITY / TDS Pocket meter with plastic carry-case, 14 ml buffer/standard solutions, 2 x CR2032 batteries, dropper Product Part Number Description LAQUAtwin EC-11 3999960125 EC-11, EC, 0-19.99mS/cm, 2-point Calibration LAQUAtwin EC-22 3999960126 EC-22, EC / temp, 0-199.9mS/cm, 3-point Calibration LAQUAtwin EC-33 3999960127 EC-33, EC/TDS/temp, 0-199.9mS/cm; 0.0-9990ppm, 3-point Cal S070 3200459672 Replacement Conductivity / TDS sensor for B-771, EC11, EC22 and EC33 514-22 3999960110 Conductivity Standard 1413 uS/cm, 6 x 14 ml 514-23 3999960111 Conductivity Standard 12.9 mS/cm, 6 x 14 ml 514-20 3999960114 Conductivity/Salinity conditioning solution 6 x 14 ml ? LAQUAtwin SALT Pocket meter with plastic carry-case, 14 ml buffer/standard solutions, 2 x CR2032 batteries, dropper Product Part Number Description LAQUAtwin Salt-11 3999960128 SALT-11, Salt by EC sensor LAQUAtwin Salt-22 3200689158 SALT-22, Salt by Na+ sensor S071 3200597237 Replacement Salt (NaCl) sensor for Salt 11 S021 3200459866 Replacement Salt (NaCl) sensor for B-721 and SALT-22 514-05 3999960112 NaCl Standard solution 0.5%, 6 x 14 ml 514-50 3999960113 NaCl Standard solution 5.0%, 6 x 14 ml ? LAQUAtwin SODIUM Pocket meter with plastic carry-case, 14 ml buffer/standard solutions, 2 x CR2032 batteries, dropper Product Part Number Description LAQUAtwin Na-11 3200689159 NA-11, Sodium Ion (Na+) S022 3200459867 Replacement Sodium (Na) sensor for B-722 and NA-11 Y022H 3200457723 Na Sodium Standard solution 2000ppm, 6 x 14 ml Y022L 3200457724 Na Sodium Standard solution 150ppm, 6 x 14 ml ? LAQUAtwin POTASSIUM Pocket meter with plastic carry-case, 14 ml buffer/standard solutions, 2 x CR2032 batteries, dropper Product Part Number Description LAQUAtwin K-11 3200689160 K-11, Potassium Ion (K+) S030 3200459868 Replacement Potassium (K) sensor for B-731 and K-11 Y031H 3200457719 K Potassium Standard solution 2000ppm, 6 x 14 ml Y031L 3200457720 K Potassium Standard solution 150ppm 6 x 14 ml ? LAQUAtwin CALCIUM Pocket meter with plastic carry-case, 14 ml buffer/standard solutions, 2 x CR2032 batteries, dropper Product Part Number Description LAQUAtwin Ca-11 3200689161 CA-11, Calcium Ion (Ca2+) S050 3200459869 Replacement Calcium (Ca) sensor for B-751 and CA-11 Y051H 3200457727 Ca Calcium Standard solution 2000ppm, 6 x 14 ml Y051L 3200457728 Ca Calcium Standard solution 150ppm, 6 x 14 ml ? LAQUAtwin IONIZED CALCIUM Pocket meter Product Part Number Description LAQUAtwin-Ca-11C 3200772940 CA-11C bovine blood with 1 x Y053L, 1 x Y053H, 2 x #251, wash bottle and carrying case S051 3200772945 Calcium ion sensor for LAQUAtwin-Ca-11C Y053 3200774921 Solution kit Y053L (2x25ml 1.25 mmol/L), Y053H (2x25ml 2.50 mmol/L), Cleaning solution #251 (3x250mL) Y053L 3200774598 Y053L (2 x 25ml 1.25 mmol/L) calibration solution Y053H 3200774599 Y053H (2 x 25ml 2.50 mmol/L) calibration solution #251 3200774601 Cleaning solution #251 (1 x 250mL) ? LAQUAtwin NITRATE Pocket meter Product Part Number Description LAQUAtwin NO3-11 3200689162 NO3-11, Nitrate Ion (NO3-) with case, 14 ml standard solutions, batteries, dropper LAQUAtwin-NO3-11C 3200689163 Nitrate Ion (NO3-) for crops, in carrying case with 5 Pipettes, Crop sample press, 3 cups LAQUAtwin-NO3-11S 3200689164 Nitrate Ion (NO3-) for soil, carrying case with 5 Pipettes, 3 bottles (100 mL), 2 sampling spoons, Tweezers, Sampling sheet B, 2 Sampling sheet holders S040 3200459870 Replacement Nitrate (NO3) sensor for B-34x & B-74x and NO3-11 Y041 3200053433 NO3 Nitrate Standard solution 5000 ppm, 6 x 14 ml Y042 3200053514 NO3 Nitrate Standard solution 300 ppm 6 x 14 ml Y043 3200053532 NO3 Nitrate Standard solution 2000 ppm, 6 x 14 ml Y044 3200053535 NO3 Nitrate Standard solution 30 ppm, 6 x 14 ml Y045 3200053536 NO3 Nitrate Standard solution 150 ppm, 6 x 14 ml ? LAQUAtwin Accessories Product Part Number Description Y-011A 3014053435 Sampling sheet C - 5 Rolls, 11mm x 6m Y046 3200053858 Sampling sheet B - 100pcs Y048 3200459736 Sampling sheet holder for Laqua Twin series Crop Press Y049 3200469679 Crop sap press New LAQUAtwin carrying case 1234567890 Carrying case for LAQUAtwin for 7 meters LAQUAtwin Measurements LAQUATWIN Three Step Measurement Follow simple, good testing procedures for accurate and dependable results: Calibrate correctly Avoid mixing samples and standards Always keep the sensor clean 1 Calibrate Always ensure the sensor is clean before calibrating. If not, clean thoroughly with water (don?t worry, LAQUAtwin meters are completely waterproof!). Place some standard solution on the sensor and press the calibration button. Once the smiley face appears, indicating that calibration is complete, wash off the standard solution with water and dry with a clean, soft tissue. 2 Test LAQUAtwin meters only need a tiny amount of sample - so no beaker is necessary. Fill the sensor with the sample and when the smiley face appears, the measurement is complete. 3 Clean Clean the sensor thoroughly with water, ready for the next test. When the sensor is nearing the end of its usable lifetime, it can be replaced; You don?t need to replace the meter. Sensors will need to be replaced after approx. 1500 measurements or when calibration cannot be completed. Sensors are sold separately and are easily removed and replaced. ? LAQUATwin One meter Six Different Methods Choose the best method according to your sample, your situation and your needs. Immersion: When you?re in the lab, you can test the sample in a beaker. Ensure the sensor guard sliding cap is open. Scoop: Use as a scoop to test water, for example from a river. Drops: LAQUAtwin meters can measure sample volumes as low as 0.05 mL. Place a drop of the sample onto the sensor with a pipette. Using the HORIBA sampling sheet, volumes down to 0.05 mL can be tested (except for conductivity measurements). Solid samples: Foods containing some moisture can be tested by placing a small piece directly onto the sensor. Powders: LAQUAtwin meters can also test dry powders. Simply place the powder sample onto the sensor, and drop on your defined volume of pure water. Paper and textiles: To test sheets of paper and textiles, cut up the sample into small pieces and place directly onto the sensor. Drop on your defined volume of pure water. LAQUAtwin sampling sheet. The sampling sheet allows trace volumes to be analysed. For example, you can even measure the pH of human skin by wiping with a sampling sheet soaked in pure water, and placing it on the sensor. Using the HORIBA sampling sheet, volumes down to 0.05 mL can be tested (except for conductivity measurements). Horiba Electrode Selection General Laboratory and Field Samples Plastic-body?pH electrodes, either refillable or gel-filled,?are ideal for field measurement.? The glass membrane of refillable electrodes offers an excellent response to low-conductivity water. When the refilling port is covered with the movable slider, the electrode can be used in submerged measurements for up to 30 minutes in a 1m depth of water.? Gel-filled pH electrode?does?not require?refilling. ToupH electrodes are?more impact-resistant than conventional glass-body pH electrodes due to their thick glass membrane. These electrodes are recommended for general laboratory samples. Examples below: 9651-10D (for field-testing) 9625-10D (for general-purpose use) 9615S-10D Standard ToupH electrode (for general laboratory application) 9415-10C Standard ToupH electrode (for general laboratory application) Precise Measurement High stability is required for precise measurement. The following electrodes have glass membranes highly sensitive to low-conductivity water and non-aqueous solvents. A movable sleeve is used at the liquid junction for easy cleaning and clog-free measurement. 9481-10C Sleeve ToupH electrode (for viscous and non-aqueous samples) 9681S-10D Sleeve ToupH electrode (for viscous and non-aqueous samples) 6367-10D (for high accuracy pH measurement) Smaller Volume Samples The volume of the sample must be enough to cover the glass membrane and liquid junction of the pH electrode during measurement. ToupH electrodes are constructed with a thick glass membrane that is highly resistant to impact and chemicals. Long pH electrodes, which come in 3 mm and 8 mm diameters, are suitable for test tubes and tall containers, while micro pH electrodes with 3 mm diameter are perfect for small tubes and trace amounts of samples.? Examples below: 9618S-10D Micro ToupH electrode (for low-volume samples) 9418-10C Micro ToupH electrode (for low-volume samples) 9680S-10D Long ToupH electrode (for large containers and long tubes) 9480-10C Long ToupH electrode (for large containers and long test tubes) 6069-10C (for very slender test tubes) Low Conductivity Samples pH measurement of low conductivity samples such as pure water and non-aqueous solvents can be very challenging. The glass membranes of the following pH electrodes produce an excellent response in the above-mentioned samples. 9481-10C Sleeve ToupH electrode (for viscous and non-aqueous samples) 9681S-10D Sleeve ToupH electrode (for viscous and non-aqueous samples) 9630-10D (for low conductivity samples) Solid and Semi-solid Samples Needle-type pH electrodes can be used to pierce and penetrate solid samples, such as meat, fruits, and food samples, during measurement. Flat pH electrodes and ISFET electrodes are ideal for surface pH measurement of moisture-containing solids such as nutrient agar, skin, cloth, leather, paper, meat, and leaves.? ISFET electrodes can also be used in food processing and other applications where glass is prohibited. 6252-10D (for food samples) 6261-10C (for flat surface measurement) Request Information... For more information on this product please click the Request information button below and we will get back to you as soon as we can. Request information Alternatively, a consultation visit from one of our highly experienced product specialists is available for this range. Typically our specialist will be able to go through the following aspects with you to help you make the right choices and be able to deliver them on time and and on budget. Your product or service requirements Performance criteria Budget constraints Site access Project timeframes Services available Environmental factors Please click the Request Consultation button below and we will get back to you as soon as we can. Request Information The links above will take you to our request information page which will forward your enquiry to our team. Please provide as much detail as possible so that we can get back to you with the right information. We normally aim to get back to you same day or within 24 hours on weekdays. If you enquiry is more urgent please call our support team on 01954 233 120 Feefo Reviews Related Blogs Conveniently Measure Sodium in Chilli Sauce with the LAQUAtwin Na-11 Pocket Meter Chilli sauces often contain significant amounts of sodium due to dissolved salts. The LAQUAtwin Na-11 pocket meter is a handy device that quickly and accurately measures the sodium content, displaying the result in parts per million (ppm) or mg/L within seconds.5 days ago How do I measure the pH of brine used in canned food testing? Brine is used in canned foods to inhibit the growth of food poisoning organisms like Clostridium botulinum, the most heat resistant of all pathogens. Clostridium botulinum can flourish in badly prepared canned foods and cause severe illness and even death. The seals on cans provides an oxygen free environment that will allow C.botulinum spores to grow in high acid foods with pH greater than ...7 years ago Product Attachments Horiba LAQUAtwin Pocket Water Quality Meters (3.14 MB) HORIBA LAQUA Product Brochure (15.04 MB) LAQUAtwin Ion Sensor Maintenance Procedures (1.39 MB) LAQUAtwin pH Sensor Maintenance Procedures (1.44 MB) Soil Nitrate Measurement for Determination of Plant-AvailableNitrogen (1.98 MB) LAQUAtwin Conductivity Sensor Maintenance Procedures (1.34 MB) Soil Salinity Measurement in Almond Orchard (5.01 MB) Nitrate Measurement in Turf Grass (2.37 MB) Rapid In-Field Determination of Nitrogen in Onions (1.74 MB) LAQUAtwin Technical Tips (3.35 MB) LAQUA Range Brochure (24.74 MB) More Information More Information ParameterMulti