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Jar Test Apparatus

Digital Jar Test Apparatus / Flocculation Tester, manufactured and supplied by Yatherm Scientific, tests coagulation and flocculation of water samples at 2 to 250 RPM with digital timer control for ETP, STP, and water treatment research. Yatherm Scientific supplies this jar tester to the UAE, USA, Nigeria, and Indonesia, along with laboratories and treatment plants across the rest of the world.
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Digital Jar Test Apparatus / Flocculation Testers / Jar Tester / Digital Flocculator with RPM & Timer

Jar test apparatus mainly used in flocculation/ Coagulation/ Sedimentation experiments for testing water-soluble polymers. It is a Laboratory stirring instrument designed for the wastewater treatment industry. The jar test apparatus stimulates the operation after stirring, chemical dosing & mixing which can help in large-scale operations.

The digital Jar test apparatus is a very advanced instrument for Jar Test Calculation in Treatment plants. The jar Test Experiment determines the coagulation and flocculation with the help of the jar Test apparatus. Jar test Experiments depend on the objective of the experiments which is based on sedimentation, the performance of coagulants & PH results. The jar test procedure for water treatment helps in the jar test for an optimum dosage of alum. Jar Test Coagulation can be determined only when you test samples in the jar at a speed of 4 RPM to 16 RPM. High speed will not allow coagulation of the treated water when undergoing the Jar test.

Models We offer: FLOCC-1, FLOCC-2, FLOCC-3, FLOCC-4, FLOCC-5 & FLOCC-6.

What Is Jar Test/Flocculation?

The jar Test is primarily the catalytic chemical reaction used in the chemical treatment of sewage & Effluent treatment plants. Jar tester stimulates the flocculation process of wastewater treatment which helps the plant operator in the calculation of the total chemicals required for the treatment plant.

During the jar test we added chemicals to the sample of water and the Apparatus started stirring at a normal speed which formed the turbidity in the water. With the help of the Jar Test apparatus, we got to know the adjustments of the number of chemicals & the progression in which they should be added. The jar test apparatus helps in identifying the process for full-scale treatment plants. The operator of the plants can perform various types of lab tests to check the amount of treatment chemical agents at different pH values for different sizes of floc.

Jar Test Apparatus Principle

Digital Flocculator works on the principle of stirring from the top by spindles at low RPM speed. Low-speed stirring provides information on the coagulation & flocculation of untreated water in the jar. The speed regulator can fix the speed and the display will show accurate results of RPM. Jar Test calculation is based on coagulation and develops in a jar only after mixing Samples at low-speed RPM.

Application:

This is a research-based testing instrument used to carry out the flocculation process during wastewater treatment. This instrument is used in the field of water treatment research & water supply plants of industries, hotels, Colleges, universities, and societies, ETP (Effluent Treatment Plant), STP (Sewage Treatment Plant), Industrial Complexes & Water Research Industry.

Need help choosing between the 2, 4, or 6-jar configuration for your lab? Reach our team here.

Frequently Asked Questions: Digital Jar Test Apparatus

What is a jar test apparatus used for?

A jar test apparatus simulates the coagulation and flocculation process used in wastewater treatment, letting an operator test different chemical dosages and stirring speeds on a small sample before applying the same process at full plant scale. It's used across ETP, STP, industrial complexes, and water research facilities.

What RPM range should be used for an accurate jar test?

Jar test coagulation is typically run between 4 RPM and 16 RPM. High-speed stirring prevents proper coagulation of treated water, so the test depends on controlled, low-speed stirring rather than fast agitation — this unit supports a 2 to 250 RPM range so the operator can dial in the correct low-speed window for the test.

How many stirring positions are available?

Models are available in 1, 2, 3, 4, 5, and 6 stirring positions (FLOCC-1 through FLOCC-6), so a lab testing a single sample and a plant running parallel comparisons across multiple jars can both find a matching configuration.

What does flocculation mean in this context?

Flocculation is the process where chemically dosed particles in water clump together into larger, settleable floc. The jar test apparatus recreates this at a small, controlled scale so the operator can observe floc size and settling behavior before committing to a full-scale chemical dosing program.

Can this apparatus run automated or PLC-controlled test programs?

Yes — beyond the standard speed regulator and digital timer, a microcomputer-controlled PLC with a large touch screen is available for data recording and automatic program modification, useful for labs that want repeatable, logged test sequences rather than manual operation every time.

What's included in packing and shipping for international orders?

Standard export packing uses an international-standard wooden case on the outside, with the product first wrapped in transparent film and packed in hardwood board on the inside. Shipping is available by air or sea, with door delivery and port delivery options, and customers can provide their own FedEx or DHL account for smoother delivery.

What warranty and after-sales support is offered?

A one-year warranty is offered along with ten years of spare parts availability for supported models, backed by after-sales support.

Is this suitable for ETP and STP plant operators, not just labs?

Yes — alongside laboratory and research use, it's specifically applied in water supply plants for industries, hotels, colleges, universities, societies, Effluent Treatment Plants (ETP), and Sewage Treatment Plants (STP) to calculate optimum chemical dosing before scaling up.

Digital Jar Test Apparatus Features: Full Breakdown

Feature Detail
Uniform stirring Jar Test Flocculator used for a uniform stirring of samples in a water testing laboratory
Speed regulator Yatherm Jar Test Apparatus models are provided with a speed regulator for variable speed and fixed speed
Stirring hardware S.S. stirring shafts with adjustable height, an S.S. propeller, and an illumination light
Digital speed & timer display A digital speed display and digital timer are provided for the user to record the data
Microcomputer PLC option Large touch screen can be provided for data recording & automatic modification in the program
DC Motor & Speed Controller Two main parts of the jar test flocculation, connected by electric wiring cables for easy maintenance
Easy-operate stirring heads Very easy to operate & can be lifted easily at the time of placing beakers
High-precision stepper DC motor Controlled by a speed knob regulator
Minimum speed The minimum speed of a jar tester is 5 RPM
Illuminated base Always illuminated with a white LED light which allows the user to observe the formation and size of the alum settling at the bottom
Body construction Complete body made of GI powder coated with plexiglass bottom for light display
Asynchronous coagulation test mixing Allows independent mixing across jar positions
Magnetic DC motor Has the advantage of increasing force
Stable speed, digital RPM display Continuous adjustment with low noise
Rust-proof stainless steel stirring rods Durable for repeated wastewater and chemical sample contact
Separate controlling option Available for individual jar control
Stirring position range Available in 1, 2, 3, 4, 5 & 6 stirring positions

If your facility also needs pH testing alongside jar testing to track coagulant performance, our pH and water testing meters range covers complementary instrumentation.

Jar Test Apparatus Specifications & Datasheet (FLOCC-1 to FLOCC-6)

Parameter 2 Jar 4 Jar 6 Jar
No. of Jars (Stirrer Options) 2 4 6
Speed Range 2 to 250 RPM (variable speed control)
Pre-set Programs 2
Timer Digital timer, 0 to 99 minutes
Controls Keypad Touch-sensitive
Digital Display LED, digital RPM indicator support
Power 220V AC supply, 50 Hz, 100W
Temperature 35°C
Accuracy ±2 RPM
Size Standard and customized
Body Powder-coated body finish

Packing:

  • Out packing: international standard export-worthy wooden case packing
  • Inner packing: clean product first wrapped with transparent film, wrapped product packed in hardwood board
  • Checking teams: the quality team performs all tests before dispatch

Shipping:

For international customers, we provide shipping by air and by sea. For small packets, shipping by air only. We offer door delivery and port delivery options. It is always better to provide your own FedEx & DHL account details so that delivery makes it easier.

We offer a year warranty with ten years of spare parts for available models to our customer satisfaction. We believe in better quality and great after-sales support.

Need the full datasheet as a PDF for procurement, or want help choosing a jar configuration for your treatment volume? Reach our team here, or browse our wider testing equipment range for related water treatment instrumentation.

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