Hanna Instruments HI 98129 pH/Conductivity/TDS and Temperature Tester

by Hanna Instruments

Product Features

• Automatic calibration at one or two points with two sets of memorized buffer values for ease of use
• Replaceable electrodes to prolong life of meter
• Automatic temperature compensation (ATC) eliminates need for extra calculations
• Waterproof and floats in water
• Automatic shut-off to extend battery life

Product Details

User Manual [277kb PDF]

• Product Dimensions: 2.5 x 1.3 x 8.3 inches ; 4.8 ounces
• Shipping Weight: 5.4 ounces (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B002ZG8L58
• Average Customer Review: 3.7 out of 5 stars  See all reviews (18 customer reviews)
• Amazon Best Sellers Rank: #301 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • #1 in Industrial & Scientific > Lab & Scientific Products > Lab Instruments > Meters > Multiparameter Meters
  • #27 in Home Improvement > Electrical > Tools & Testers > Multi Testers
  • #94 in Home Improvement > Power & Hand Tools > Measuring & Layout Tools > Scanners & Testers

Product Description

The Hanna Instruments HI 98129 is a multi-parameter tester that measures pH, electro-conductivity (EC), total dissolved solids (TDS), and temperature, and features automatic temperature compensation (ATC), an LCD screen, automatic shut-off, and a waterproof body that floats in water. The tester automatically compensates for the effects of temperature when taking pH and EC/TDS readings, so additional measurements and manual temperature entries are unnecessary.

The HI 98129 meter has a replaceable pH electrode with an extendable cloth junction, and an EC/TDS graphite electrode that is resistant to salts and other corrosives. These features extend the life of the meter by allowing for replacement of the electrodes. Calibration is automatic at one or two points, with two sets of memorized buffer values (pH 4.01/7.01/10.01 or 4.01/6.86/9.18). The EC/TDS conversion factor and temperature compensation coefficient (&Beta) is user-selectable.

The tester functions in temperatures of 0.0 to 60.0 degrees C/32.0 to 140.0 degrees F (+ or - 0.5 degrees C/1 degree F), and has a range of pH 0.0 to 14.0 (+ or - 0.05 pH). EC range is 0 to 3999 uS/cm, TDS range is 0 to 2000 ppm (+ or - 2% F.S), with respective resolutions 1 uS/cm and 1 ppm. At 3.5 ounces and 8.3 x 2.7 x 1.3 inches (H x W x D), the HI 98129 is sized for taking measurements in the field. (H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.)

pH testers measure the acidity or alkalinity of a substance and are commonly used by researchers, manufacturers, and hobbyists.

Hanna Instruments manufactures analytical instrumentation and supplies, including pH meters, electrodes, chemical reagents, and buffer solutions. The company, founded in 1978 and headquartered in Woonsocket, RI, meets International Organization for Standardization (ISO) 9001 standards.

What’s in the Box?

• HI 98129 meter
• Protective cap
• Electrode removal tool
• Four 1.5V batteries
• Instructions

Customer Reviews

Most Helpful Customer Reviews

16 of 16 people found the following review helpful:

5.0 out of 5 stars Water Gardening Must-Have, January 6, 2010

By 

SunTrish (Durham, NC USA) - See all my reviews

I have used this meter for about 4 years for hydroponic gardening (hobby level). I have recently been using the meter to test the water and adjust pH and fertilizer in my kitchen Aerogarden. It's easy to use and accurate for this use, and has made a big difference in the quality and quantity of my gardening results.

20 of 21 people found the following review helpful:

5.0 out of 5 stars Great meter but make sure you also purchase the solutions, April 10, 2011

By 

Cdav - See all my reviews

Amazon Verified Purchase

This review is from: Hanna Instruments HI 98129 pH/Conductivity/TDS and Temperature Tester (Kitchen)

This is a great meter! If you are looking for PH and PPM this is it. My only suggestion is to buy all the solutions with it. You will spend close to $200 but you will have everything you will need for this. You will need to buy these 5 solutions:

Calibrating the PH sensor:

Hanna Instruments HI 7007M 7.01 pH Buffer Solution

Hanna Instruments HI 7004M 4.01 pH Buffer Solution

Calibrating PPM:

Hanna Instruments HI 7031M Conductivity Solution, 1413 uS/cm, 0.23L

Storage & Cleaning:

Hanna Instruments HI 70300M Storage Solution for pH/ORP Electrodes, 0.23L

Hanna Instruments HI 7061M Electrode Cleaning Solution

11 of 11 people found the following review helpful:

5.0 out of 5 stars Great product!!!!!!, December 8, 2010

By 

Gary - See all my reviews

Amazon Verified Purchase

This review is from: Hanna Instruments HI 98129 pH/Conductivity/TDS and Temperature Tester (Kitchen)

I got the tds meter in package and it works great. Turns on real quick measures good. Takes a lil bit as far as the tds counting and ph counting. but it is very accurate within .01 accuracy...Very good quality. I was pricing a tds meter and a ph meter waterproof and temp meters. And its to much hassle to fanagle with different meters....At the end of it all, i only save 10 20 bucks...Meaning..THIS thing has it all in 1 shot, Worth the extra few bucks. Waterproof, tds, ph and temperature all in 1...Can't beat it... Good quality, u can just let it float in the water. The manual says to clean the tip of it after using to make the meter last longer. So thats what i do