Hanna HI775 Handheld Colorimeter for Freshwater Alkalinity — No Reagents Included

Manufacturer: Hanna Instruments Model: HI775 Checker® HC Product Type: Digital handheld freshwater alkalinity colorimeter Measurement Parameter: Total alkalinity Reagents: Not included

Product Description

The Hanna HI775 Handheld Colorimeter for Freshwater Alkalinity is a compact, portable digital water-testing instrument designed to measure alkalinity in freshwater samples. Using colorimetric measurement technology, this handheld meter provides a direct digital reading in parts per million (ppm) as calcium carbonate (CaCO₃), eliminating the need to visually match sample colors against a traditional chemical test kit chart.

Designed for convenient, straightforward operation, the HI775 is suitable for routine freshwater testing in laboratories, water treatment facilities, environmental monitoring, educational settings, and other applications where freshwater alkalinity measurements are required.

Alkalinity is an important water-quality parameter because it represents the water's capacity to neutralize acids and resist sudden changes in pH. Monitoring alkalinity can help water-quality professionals evaluate buffering capacity, assess treatment requirements, and maintain consistent water conditions.

The Hanna HI775 features a dedicated single-parameter design, a clear digital display, and simple button-operated testing. Its compact size makes it convenient for field measurements as well as routine testing in the laboratory.

This NIS Supply offering includes the Hanna HI775 colorimeter without alkalinity reagents. Customers who already have compatible reagents or prefer to purchase their testing chemicals separately can obtain the instrument without an included reagent starter kit.

Key Features and Benefits

• Direct digital readings: Displays freshwater alkalinity results without visual color-chart interpretation.

• Measurement range: Measures alkalinity from 0 to 500 ppm as CaCO₃.

• Fine resolution: Displays readings in 1 ppm increments.

• Compact handheld design: Lightweight and portable for field or laboratory use.

• Simple operation: Button-operated measurement process.

• Dedicated testing: Designed specifically for freshwater alkalinity measurement.

• Battery powered: Operates using one 1.5 V AAA battery.

• Automatic shutoff: Helps conserve battery power after inactivity.

• Reagent-free product configuration: Supplied without the standard alkalinity reagent starter kit.

Technical Specifications

The specifications below are based on the manufacturer's published HI775 product information.

Accuracy note: The stated accuracy is ±5 ppm ±5% of the reading at 25°C. It should not be interpreted as ±5% alone.

Applications

The Hanna HI775 is designed for measuring alkalinity in freshwater samples and may be used in applications such as:

• Drinking water treatment: Monitoring alkalinity as part of water-quality management and treatment control.

• Environmental monitoring: Evaluating alkalinity in freshwater bodies and other suitable freshwater samples.

• Aquariums and aquaculture: Monitoring an important water-quality parameter when appropriate to the testing protocol.

• Laboratory testing: Performing routine freshwater alkalinity measurements.

• Educational institutions: Demonstrating water chemistry and alkalinity testing.

• Industrial water quality: Supporting freshwater testing and treatment processes.

The HI775 is specifically designed for freshwater. Do not assume that its published accuracy or measurement performance applies to seawater, brines, or other matrices without verifying suitability with Hanna Instruments.

How the Hanna HI775 Works

The HI775 uses a colorimetric method to determine alkalinity. A freshwater sample is prepared according to the manufacturer's testing procedure, and a compatible reagent is added to produce a measurable color change. The instrument's optical system measures the resulting light response and displays the calculated alkalinity concentration.

The normal testing process involves:

1. Preparing the freshwater sample in a compatible cuvette.

2. Taking a reference measurement as directed in the manufacturer's instructions.

3. Adding the specified alkalinity reagent and following the prescribed reaction time.

4. Measuring the reacted sample and reading the displayed alkalinity result.

Important: The instrument cannot perform its normal colorimetric alkalinity test using water alone. Compatible reagents are required to generate the chemical reaction used for measurement. Reagents are not included with this NIS Supply offering and must be obtained separately.

What's Included with This NIS Supply Offering?

This listing is for the Hanna HI775 handheld colorimeter without reagents.

• Hanna HI775 Checker® HC handheld colorimeter.

• Reagents: NOT INCLUDED.

Please confirm the exact included accessories with NIS Supply before ordering. The manufacturer's standard HI775 package normally includes two sample cuvettes with caps, an alkalinity reagent starter kit for 25 tests, a syringe with tip, a battery, instructions, and a quick-start guide. This NIS Supply listing excludes the reagent kit, and the standard package contents should not be assumed to apply in full to this configuration.

Compatible Accessories and Reagents

The following manufacturer-designated items may be purchased separately, subject to availability:

• Hanna HI775-26: Alkalinity reagent set for 25 tests.

• Hanna HI775-11: Alkalinity calibration check set.

Verify compatibility and follow the manufacturer's instructions before use. Calibration check standards are intended to verify instrument performance and are not a substitute for the reagents required to conduct a sample test. 

Important Purchasing Information

• This product is the Hanna HI775 freshwater alkalinity colorimeter, not a pH meter or a multiparameter water analyzer.

• The instrument reports alkalinity as ppm CaCO₃.

• Alkalinity is different from pH; the two measurements are related to water chemistry but are not interchangeable.

• Reagents are not included in this listing.

• Please contact National Industrial Supply to confirm accessory configuration, current availability, pricing, and any applicable warranty details before ordering.

National Industrial Supply

National Industrial Supply

National Industrial Supply provides specialized refractometers and measurement instruments for industrial, laboratory, chemical, refrigeration, food-service and process-control applications.

If you need a refractometer configured for a different GAS/SPEC formulation or another specialty chemical, contact us for assistance identifying the appropriate scale and instrument.

We offer expert assistance in identifying the right instrument and scale for your application.

Contact Us!

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30777 Rancho California Rd #891420

Temecula, CA 92589

Phone: (951) 308-9269

Email: nisupply@gmail.com

Website: www.nisupply.com

Contact National Industrial Supply for product availability, pricing, and assistance with specialized refractometer applications.