The DiST® family of testers is widely used for monitoring EC/TDS in drinking water, water conditioning, reverse osmosis, cooling towers, wastewater, laboratories, agriculture, aquaculture and aquariums, hydroponics and the printing industry.

It can measure EC upto 19.99 mS/cm

These testers feature an amperometric graphite electrode that provides better repeatability in measurements since they do not oxidize. An amperometric measurement of EC/TDS is based on Ohm’s Law, I = V/R where R depends on the distance between two pins and their surface. Oxidation changes both the distance and surface which will affect accuracy. The DiST’s non-oxidizing graphite pins are able to provide an optimal surface for accurate, dependable results.

When calibration is necessary, simply submerge the electrode tip into calibration solution (5.00 mS/cm or 12.88 mS/cm) and adjust the trimmer on the side of the tester.

It is rugged and reliable pocket-sized testers that offer quick and accurate reading of Conductivity. It has manual calibration facility and it can measure conductivity upto 19.99 mS/cm

Graphite electrodes
ATC
Simple, one point calibration
Easy to use
Economical

(DiST®4) is supplied with protective cap, screwdriver, batteries and instructions.

Name	Conductivity tester with ATC, 19.99 mS/cm
EC Range	0.00 to 19.99 mS/cm
EC Resolution	0.01mS
EC Accuracy	±2% F.S.
EC Calibration	manual, one point
EC/TDS Temperature Compensation	automatic, 0 to 50°C (32 to 122°F)
Cell Type	amperometric graphite
EC/TDS Probe	amperometric graphite electrode
Battery Type/Life	4 x 1.5V alkaline / approximately 200 hours of continuous use
Environment	0 to 50°C (32 to 122°F); RH max 95%
Dimensions	173 x 42 x 23 mm (6.8 x 1.7 x 0.9’’)
Weight	87 g (3.1 oz.)

Warranty:

These meters are warranted for a period of one year against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. Probes are warranted for a period of six months. This warranty is limited to repair or replacement free of charge. Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service is required, contact your local Hanna office. If under warranty, report the model number, date of purchase, serial number and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization (RGA) number from the Technical Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection.

Its use in Agriculture:

Assessment of Nutrient Levels:
- Conductivity testers are used to assess the nutrient levels in various agricultural solutions, including soil extracts, nutrient solutions in hydroponic systems, and irrigation water. The electrical conductivity of the solution is directly related to its nutrient concentration, allowing farmers to determine the availability of essential nutrients for plant uptake.
- By regularly monitoring the electrical conductivity of nutrient solutions, farmers can ensure that plants receive adequate nutrition throughout their growth cycle. Adjustments to nutrient formulations or irrigation practices can be made based on conductivity measurements to maintain optimal nutrient levels for healthy plant growth and development.
Nutrient Management:
- Effective nutrient management is essential for maximizing crop yields and quality while minimizing environmental impacts. Conductivity testing enables farmers to make informed decisions about fertilization practices, ensuring that crops receive the appropriate balance of nutrients.
- By measuring the electrical conductivity of soil solutions, farmers can assess nutrient availability and adjust fertilization programs accordingly. This helps prevent nutrient deficiencies or excesses, which can lead to reduced yields, nutrient leaching, or environmental pollution.
Monitoring Soil Salinity:
- High levels of soil salinity can have detrimental effects on crop growth and productivity. Conductivity testers are used to monitor soil salinity levels by measuring the electrical conductivity of soil extracts or saturated soil paste.
- Excessive soil salinity can hinder water uptake by plant roots and cause osmotic stress, leading to reduced crop yields and poor quality. Regular monitoring of soil salinity with conductivity meters allows farmers to implement corrective measures such as leaching or soil amendments to mitigate salinity problems and maintain soil fertility.
Quality Control in Irrigation Water:
- Water quality is critical for irrigation, as poor-quality water can contain high levels of salts or other contaminants that may harm crops. Conductivity meters are used to assess the quality of irrigation water by measuring its electrical conductivity.
- High conductivity levels in irrigation water may indicate the presence of dissolved salts, such as sodium chloride or calcium sulfate, which can accumulate in the soil over time and adversely affect crop growth. Conductivity testing helps farmers identify water sources with suitable quality for irrigation and implement appropriate water management practices to prevent soil salinization and crop damage.

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