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Microprocessor pH-EC Meter Manufacturer,Supplier and Exporter in India

Product Code : EL-CM-2188
Jlab Export is a leading Microprocessor pH-EC Meter Manufacturer,and suppliers in India

Water and soil samples are usually checked for both pH and electrical conductivity, and this microprocessor bench meter reads both, plus temperature. During pH calibration it recognises 4.00, 7.00 and 9.20 pH buffers. In EC mode it moves between five ranges up to 200 mS by itself, and results from up to 90 samples stay in memory for printing.

Specifications

Measures	pH, conductivity (EC) and temperature
pH	0 to 14.00 pH, resolution 0.01 pH, accuracy ±0.01 pH ±1 digit
Buffer recognition	4.00, 7.00 and 9.20 pH
Conductivity	Five auto ranges, 0–20 µS up to 0–200 mS, accuracy ±0.5% FS ±1 digit
Cell constant	Adjustable, 0.05–10.5
Temperature compensation	Auto or manual, 0–100 °C for pH and 0–50 °C for EC, coefficient adjustable 0.1–4.0%
Temperature	0–100 °C, resolution 0.1 °C
Display, keys and memory	16 x 2 line backlit LCD, 8 membrane keys, 90-sample memory, Centronics printer port
Power, size and weight	230 V ±10% AC, 50 Hz, 285 x 190 x 90 mm, about 2.5 kg
Supplied with	pH combination electrode, 4.00 and 7.00 pH buffer tablets, conductivity cell, temperature probe, electrode stand, mains lead, manual and dust cover
Minimum order quantity	1 unit
Dispatch time	Usually 7–10 working days
Manufacturer	JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India

Titration Experiments with pH and Conductivity

A weak acid titration shows both channels at work. The teacher makes up a dilute acetic acid solution from Glacial Acetic Acid and Distilled Water. Students put a measured volume in one of the Tall Form Beakers, Borosilicate Glass, Economy on a Magnetic Stirrer and add sodium hydroxide solution in small steps. The pH climbs gently, then jumps near the end point, which lies above pH 7 for a weak acid. At half-neutralisation the pH equals the pKa of acetic acid.

Run again with the conductivity cell, the same titration gives a conductometric graph. The reading rises slowly while sodium acetate forms, then more steeply once excess hydroxide is present, and the break between the two lines marks the end point. Agriculture classes can use the meter to compare the pH and EC of irrigation water and soil extracts.

Frequently Asked Questions

Do I need all three buffers to calibrate the pH side?
No. Two buffers that bracket your samples are enough for routine work: 7.00 and 4.00 pH for acidic samples, or 7.00 and 9.20 pH for alkaline ones. The meter recognises all three values, while the box contains tablets for the 4.00 and 7.00 pH buffers.

What does automatic temperature compensation correct for pH?
It corrects the electrode response for the sample temperature read by the temperature probe, from 0 to 100 °C. Without the probe you enter the temperature by hand. It does not change the true pH of the sample, which itself varies with temperature, so record the temperature with each reading.

Why does the conductivity reading drift when I first dip the cell?
The cell needs a few seconds to reach the sample temperature, and air bubbles trapped on the electrodes lower the reading. Tap the cell gently to clear them, wait for a steady value and keep the cell at the same depth for every sample.

Can this model show TDS as well?
No. It reads pH, conductivity and temperature only. For TDS on a bench unit of the same type, the Microprocessor pH-EC-TDS Meter adds TDS ranges up to 200 ppt alongside pH and EC.