pH, Conductivity, Total Dissolved Solids, and Temperature Testers
In 1986, Hanna Instruments revolutionized the way pH is measured with the introduction of the pHep® (pH electronic paper). This tester brought electronic pH measurement out of the lab, giving the general public, farmers, students, and many other users access to a pH meter that was highly accurate and simple to use. The meter was also very affordable at a price point less than $50.00. Since the introduction of the pHep, Hanna Instruments has been at the forefront of innovating tester technology. Our innovations include the first tester with a replaceable pH electrode, the first combination testers that can measure multiple parameters, the first tester with a large, multi-level LCD that shows both pH and temperature readings. Hanna Instruments now offers an extensive line of application specific testers optimally designed for difficult samples like cheese, meat, bread dough, wine, and beer, to name a few.
Hanna Instruments has had a long history of producing innovative portable meters. Innovations include the first portable conductivity meter in 1980 that used a four-electrode design to allow the measurement across a variety of ranges. In 1984 we introduced the first microprocessor based portable. The microprocessor allowed for automatic calibration instead of using trimmers for manual calibration. In 1990, Hanna introduced the first waterproof portable meter. Waterproof portable meters are now the standard across many industries due to the potential for getting wet, water or solutions, which could damage the sensitive electronics. We continue to use the best available technology to introduce enhancements to the measurement system to help ensure the accurate and reliable readings.
Portable meters are available for the following categories:
- pH and pH/mV
- Dissolved Oxygen
Hanna Instruments has a long history of producing innovative instrumentation. We continue to use the best available technology to introduce enhancements to the measurement system to help ensure the accurate and reliable readings.
The benchtop meters are broken down into the following series:
- HI5000 with Large Color LCD and Advance Features
- edge Tablet Style Meters
- HI2000 Basic Benchtops
- Specialty Meters with Unique Features
Hanna Digital Refractometerswith Stainless Steel Sample Well and 1.5 Second Response Time
Hanna digital refractometers eliminate the uncertainty associated with mechanical refractometers. After a simple user calibration with distilled or deionized water samples are measured within seconds. The measurement and temperature, selectable in °C or °F, are displayed on the easy-to-read LCD. With IP65 water protection, these refractometers are durable and compact enough to be used at home, in the lab, or out in the field.
Hanna offers turbidimeters based on the following two Methods:
- ISO 7027 “Water Quality: Determination of Turbidity”
- USEPA Method No.180.1, “Turbidity”
Specific wavelengths are recommended for each method. For the USEPA and Standard Methods, the wavelength in the visible range of the spectrum is recommended, where the European ISO method requires an infrared light source.
The Infrared Method (ISO 7027)
The ISO 7027 standard specifies the key parameters for the optical system to measure turbidity for drinking and surface water, using the formazin-based metric method. ISO turbidity meters operate by passing a beam of infrared light through a vial containing the sample to be tested. The light source is a High Emission Infrared LED. A sensor positioned at 90° with respect to the direction of the light detects the amount of light scattered by the undissolved particles present in the sample. A microprocessor converts these readings into FTU (FNU) values.
The US Environmental Protection Agency Approved Method (180.1)
The USEPA Method 180.1 specifies the key parameters for the optical system to measure turbidity for drinking, saline and surface water, in a 0 to 40 NTU range, using the nephelometric method.
Meters compliant with EPA approved methods are designed to meet or exceed the criteria specified by the USEPA Method 180.1 and Standard Method 2130 B.
Hanna Instruments offers a wide variety of instrumentation for measuring turbidity. Products include benchtop and portable meters that are based on ISO and EPA methodology. Specialized portable meters are available for monitoring bentonite in wine and haze in beer.
Benchtop Turbidity Meters
Benchtop turbidity meters include versions based ISO and EPA methods. Meters based on the EPA method have NTU, Nephelos, and EBC as units of measure. A benchtop based on the EPA method is also available to measure chlorine. Meters based on the ISO method can display results as FNU, FAU, NTU, and EBC.
Chemical Test Kits
Hanna Chemical Test Kits
Hanna test kits are a simple way to perform an accurate chemical analysis. A wide variety of single and multi-parameter test kits are available and include methods performed with a color cube, checker® disc, titration, and turbidimetric methods.
Quick and easy to use, Hanna colorimetric chemical test kits are the ideal solution for water analysis of many chemical parameters. The kits are equipped with a transparent container, which has the color scale right next to the sample being tested. This makes the color comparison process simple and error free. The reagents are either liquid or powder, depending on the parameter to be measured.
Hanna Checker Disc test kits use the technology of colorimetric kits to provide greater accuracy and resolution. The Checker® Disc is a color comparison wheel shaded from dark to light in proportion to the concentration of the chemical parameter being tested. The user puts both the blank and the reacted cuvettes inside the Checker Disc then, by turning the wheel, can visually find the concentration that best equals the reacted sample. This technique enhances resolution and accuracy.
Titration test kits kits are easy to use without any loss of resolution and accuracy. To determine the concentration of the chemical parameter, these kits use a titration technique of counting the number of drops of titrant necessary to cause a color change in the sample. Dropper bottles make titration quick and easy without compromising accuracy. The endpoint can be determined with enhanced accuracy and simplicity.
Hanna test kits are supplied ready to use, complete with all the necessary accessories. They are designed to help you to work better, faster, and safer. All Hanna chemical test kits use color-coded dropper bottles, which are easy to recognize during analysis. With some kits, a plastic beaker is provided featuring a ported cap to prevent spills and waste. Every kit is manufactured according to the highest quality standards and a Safety Data Sheet (SDS) is available for each product, online.
- Designed for Specific Applications - Hanna combination chemical test kits are tailor made for specific applications.
- Includes all you need - Hanna test kits include all the necessary reagents and accessories for their specific application.
- Ideal for field measurements - Multiparameter test kits from Hanna are equipped with a hard carrying case helps to keep your equipment neat, organized, and easy to carry around in the field. Our carrying cases are rugged, built to last, and easily refilled with replacement reagents as needed.
- Comprehensive Instructions - Every chemical test kit is supplied with a comprehensive, easy-to-understand instruction manual. The manuals guide users through the analysis step-by-step, making it easy for even non-technical personnel to perform tests.
- One more advantage: Hanna’s exclusive pHep® for pH measurements
For those kits that offer pH measurements, Hanna has included the exclusive pHep electronic tester so that your pH analysis will always be quick and reliable. Traditional pH test strips have limited accuracy and do not cover the entire pH range. Due to the pHep's long life, high accuracy, and extended range, these problems are avoided.
There are two types of magnetic stirrers; mechanical and electronic. Most manufacturers of magnetic stirrers use the mechanical approach, using steel and aluminum for the structural material and outdated methods of speed control. These units are not only very heavy, but also very inaccurate. The use of these materials and methods appear to make the units rugged and strong, but they are instead cumbersome and obsolete.
Something as simple as completely dissolving salts in a medium is, in reality, a science. Often this cannot be achieved with simple mechanical processes. The only choice that the user has with mechanical products is to increase the stirring time or the temperature. With electronics, you can do more...the Hanna approach is electronic.
Speedsafetm from Hanna
Speed sensor and limiter: Each Hanna stirrer is equipped with a speed-sensing device (opto-sensor) coupled with an FVC (frequency voltage converter), which monitors the speed. As the speed reaches a preset maximum level, the speed limiter shuts down the VCO (voltage-controlled oscillator) to slow down the motor speed. This ensures that when the load is suddenly removed from the stirrer, the motor will not accelerate to a high speed that will be hazardous to both the user and the stirrer; a feature not commonly found in conventional stirrers.
Stirrer parts are engineered and manufactured to strict specifications to ensure absolute reliability. All components are mounted into a molded casing covered with either ABS plastic or a stainless steel plate, which are splash proof and chemically resistant. Minimal vibration and a well-balanced rotating arm provide years of trouble-free operation.
ABS Plastic Surface
The following stirrers have an ABS plastic stirring surface. These stirrers include a basic version that is 4.8 x 4.8” (120 x 120mm) and a compact round version that has a diameter of 137mm. The compact round version is available in 11 different colors, with or without a built-in probe holder.