Ohaus Conductivity Meter in Bangladesh - Pen Type - Jadu Bazar

Ohaus Conductivity Meter (Pen Type)

Brand Ohaus
Model ST20C-A
Origin USA
Warranty 12 Months
SKU: A00A246 Categories: ,


After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of pen meters that provide accurate measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity, and total dissolved solids (TDS). Starter pen meters are the economical option when you are simply looking for meters that will provide accurate measurement without restriction. Ohaus Conductivity Meter in Bangladesh

Applications pH, oxidation-reduction potential (ORP), conductivity, dissolved oxygen (DO), salinity, total dissolved solids (TDS), temperature measurement
Display Liquid crystal display (LCD) display with secondary information line (on select models)
Operation 4 1.5V batteries (included)
Communication N/A Ohaus Conductivity Meter in Bangladesh
Construction ABS Housing
Design Features Easily replaceable electrodes, automatic shut off feature


What Is a Conductivity Meter?

A conductivity meter measures the amount of electrical current or conductance in a solution. Conductivity is useful in determining the overall health of a natural water body. It is also a way to measure changes in wastewater procedures at water treatment plants. Conductivity meters are common in any water treatment or monitoring situation, as well as in environmental laboratories. According the Environmental Protection Agency, a good conductivity meter costs about $250.

How a Conductivity Meter Works

The meter is equipped with a probe, usually handheld, for field or on-site measurements. After the probe is placed in the liquid to be measured, the meter applies voltage between two electrodes inside the probe. Electrical resistance from the solution causes a drop in voltage, which is read by the meter. The meter converts this reading to milli- or micromhos or milli- or micro Siemens per centimeter. This value indicates the total dissolved solids. Total dissolved solids is the amount of solids that can pass through a glass-fiber filter.

Conductivity Basics

Conductivity is the electrical current in a solution, but that value depends on the liquid’s ionic strength. It also relies on which ions are present, in what concentration and in what form, such as what state of oxidation or mobility the ions are in. Ions carry a negative or positive electrical charge: anions are negative and cations are positive. In natural water bodies, the ions that contribute to high conductivity result from dissolved minerals and salts.

Temperature Ohaus Conductivity Meter in Bangladesh

The reading of a conductivity meter is usually without a temperature correlation. Since ionic strength, and therefore conductance, is temperature-dependent, the reading may be inaccurate. Thus, many conductivity meters have a specific conductance measurement as well. When in the specific conductance mode, the meter reads the conductivity of the solution at 25 degrees Celsius, not at the actual temperature. This results in a more standardized reading.

Salinity and Total Dissolved Solids

Salinity is the amount of dissolved salts in a solution. Conductivity meters equipped with a salinity option internally convert the conductivity reading to one of salinity. Fresh water bodies should have a much lower salinity concentration than ocean water, which is estimated between 20 and 30 parts per trillion, according to Washington State’s Department of Ecology. Total dissolved solids can be determined by multiplying the conductivity measured in microSeimens by a factor of 0.67.

Calibration Ohaus Conductivity Meter in Bangladesh

Calibration leads to a more accurate reading. To calibrate a meter, follow the instructions for that meter; in general, the steps are easy and standardized. The meter usually has a menu item that allows you to enter the calibration mode or a setting on the side that you can adjust with a small screwdriver or tool. Place the probe in a solution with a known conductivity value and temperature and set the meter to that conductivity. Sometimes several standards are required. The Environmental Protection Agency’s EPA 120.1 outlines a standardized analytical procedure for calibrating and measuring using a conductivity meter.

What does conductivity meter measure?

Conductivity meter allows us to measure the level of conductivity in solutions. Conductivity is an ability of materials (solutions, metals or gases) to pass an electric current. While all materials possess the ability to pass electric currents, the degree of such ability can vary. Substances with conductive aqueous solutions are referred to as electrolytes. These electrolytes are able to break down into ions when dissolved in water, thus creating free ions in the solution. Acids, bases, and salts are examples of electrolytes. Substances with non-conductive aqueous solutions are referred to as nonelectrolytes. These substances are often composed of covalent bonds, and examples include Carbon-containing compounds, fat, and sugar. And. So so. And. So so. And. So so

Solutions with high concentration of ions will exhibit high conductivity. On the other hand, solutions with low concentration of ions will result in small conductivity reading. A few factors that effect conductivity measurement are temperature, concentration of ions, and the nature of ions present in the solution.

The figure shows the meaning of conductivity with three different examples. Nonelectrolyte substance, ethanol, does not produce free ions in solution and therefore cannot conduct electricity. Potassium Chloride (KCl) is a strong electrolyte that completely ionizes in water, thus possessing high conductivity. Acetic acid is a weak electrolyte that does not fully ionize in water, conducting low amount of electricity. (Figure source: https://opentextbc.ca/chemistry/chapter/11-2-electrolytes/)

Applications Ohaus Conductivity Meter in Bangladesh

Conductivity measurements are important in many aspects of life, not just in scientific inquiries. Conductivity meters are used widely in areas such as water treatment and agricultural industries. Here are some examples of conductivity meter application found in real life:

Used to evaluate the quality of water – is the water drinkable or usable for irrigation/industry?
Measure the quality of water in wastewater facility for treatment – corrosion measurement, etc And. So so. And. So so. And. So so
Water pollution monitoring And. So so. And. So so. And. So so
Measure salinity of the surface water – important for wildlife, aquatic plants, and agriculture And. So so. And. So so. And. So so
Evaluate purity of water used for pharmaceuticals, cosmetics, food, etc And. So so. And. So so. And. So so

How does a conductivity meter work?

A conductance of a solution can be measured by applying an alternating electrical current to the two electrodes present in the probe. While this electrical current is applied to the solution, the cations (ions with a + charge) move to the negative electrode and the anions (ions with a – charge) move to the positive electrode. This movement of the ions leads to the solution to be conductive. And. So so. And. So so. And. So so

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We are always providing the best quality Scientific Laboratory Equipment. We always try to supply our clients with the original Brand & Quality tested products with service; Scientific Laboratory equipment in Bangladesh online store – www.jadubazar.com And. So so. And. So so. And. So so
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Additional information


: Ohaus


: ST20C-A



Meter Type

: Conductivity

Measurement Range

: 0.00 – 199.9 μs/cm; 0.0 – 99.0 °C


: ± 1.5% / ± 0.5 °C

Measurement Resolution

: 0.1 μs/cm




: Yes

Temperature Compensation

: Automatic

Accuracy ± (Temperature)

: 0.5 °C

Automatic Shutdown

: Yes, After 6 minutes of non-use

Battery Life

: 200 Hours with Disposable Batteries


: 1 Point

Conductivity Accuracy (±)

: 1.5 %

Conductivity Measuring Range

: 0.0 – 199.9 µS/cm


: 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW)

Measurement Range (Temperature)

: 0 °C ; 99 °C

Net Weight

: 3.88 oz (110 g)

Number of Buttons

: 3


: 4 AG13 Batteries (Included)

Protection Rating

: IP67

Temperature Display

: Yes

Temperature Range

: 0 °C ; 99 °C

Temperature Sensor

: 50 KΩ NTC

Working Environment

: 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing)

Wrist Strap

: Yes

Terms and Conditions

Cash on Delivery

Jadu Bazar is a online shopping store in Bangladesh. We sell meny product on cash on delivery. Cash on delivery is a payment collection method that requires customers to pay for the product upon delivery. That means, If you order a product from Jadu Bazar, you can pay cash for your order when the product you will received from our delivery team. But delivery cost must be paid in advance (Bkash, Nagad, Rocket) then we will send your product.

Due to the current unstable market conditions, to be sure about the stock and price and order online, call: 01919-910640

Delivery Policy

After complete a order and delivery cost paid, Jadu Bazar tries to deliver all the goods to our valuable customer

If your delivery address is within Dhaka city, products will be delivered by within 1 business days. If it is outside Dhaka then it will take 2-3 business days.

Our Business Day: Saturday to Thursday / 09 am – 09 pm. Except public holidays.

Return Policy

Instant return if goods have solid problem.

We provide great customer experience each time you shop with your Jadu Bazar. If you are not satisfied with your purchase, we ensure ‘Replacement Guarantee’. We will replace your purchased product if the product has any defect by its manufacturer or if the product is not the same one you ordered.

All you need to do is give us a call or drop an email at admin@jadubazar.com within a period of 24 Hours from the date of delivery. However, please return the product with the tags intact and in their original packaging, in an unwashed and undamaged condition. Replacement for products is subject to inspection and checking by Jadu Bazar team. Replacement cannot be possible if the product is burnt, damaged by short circuit, or broken by customer.


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