Hanna Instruments HI 98121 Combination pH and ORP Temperature Tester

by Hanna Instruments

Product Features

• One- or two-point manual pH calibration for obtaining results across a wide range
• Non-clogging fiber junction and replaceable electrode to prolong life of meter
• Automatic Temperature Compensation (ATC) eliminates need for extra calculations
• Waterproof and floats if dropped in water
• Large LCD screen for readability

Product Details

Spec Sheet [434kb PDF]

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User Manual [534kb PDF]

• Product Dimensions: 6.4 x 1.6 x 1 inches ; 3.5 ounces
• Shipping Weight: 5.3 ounces (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S.
• ASIN: B002NX0VWO
• Average Customer Review: 3.8 out of 5 stars  See all reviews (9 customer reviews)
• Amazon Best Sellers Rank: #136 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • #2 in Industrial & Scientific > Lab & Scientific Products > Lab Instruments > Meters > pH Meters

Product Description

The HI 98121 pH/ORP/Temperature Tester is a waterproof combination pocket pH, Oxidation Reduction Potential (ORP), and temperature tester with a replaceable electrode and a non-clogging, replenishable fiber junction.

The meter features a large LCD screen for readability, an ergonomically designed waterproof casing, and automatic temperature compensation to eliminate the need for additional calculations. It has a replaceable electrode and renewable reference junction, which helps prolong the life of the tester.

The HI 98121 tester functions in temperatures of -5.0 to 60.0 degrees C/23.0 to 140.0 degrees F (+ or - 0.1 degrees C / 0.1 degrees F), and has a range of -2.00 to 16.00 pH (+ or - 0.05) with a resolution of 0.01 pH. The meter can be calibrated at one or two points for pH with auto-buffer recognition, and against five memorized buffer values. For ORP (Oxidation Reduction Potential) readings, the tester has a range of + or - 1000mV (+ or - 2) with a resolution of 1mV and automatic factory set calibration. Dimensions are 163 x 40 x 26 mm (6.4 x 1.6 x 1.0"), with weight 100 g (3.5 oz.).

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

Hanna Instruments manufactures a wide variety of analytical instrumentation, including pH meters, multi-parameter meters, electrodes, chemical reagents, and buffer solutions. Founded in 1978, Hanna is headquartered in Woonsocket, RI, with subsidiaries in 32 countries. Hanna Instruments holds many firsts in the field of analytical instrumentation, including a pH electrode with a built-in temperature sensor, an electronic pocket-sized pH tester, and a replaceable electrode pH pocket tester. To ensure the quality of its products, Hanna is a vertically integrated manufacturer and does not subcontract any part of its manufacturing.

What’s in the Box?

• Protective cap
• Calibration screwdriver
• Four 1.5V batteries
• Instructions

Customer Reviews

Most Helpful Customer Reviews

11 of 11 people found the following review helpful:

5.0 out of 5 stars Hanna Ph & ORP Meter, June 24, 2010

By 

D. Glier (Northern Kentucky) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Hanna Instruments HI 98121 Combination pH and ORP Temperature Tester (Misc.)

This is a fine and reasonably price Ph Meter. It is compact and ruggedly built. My intended use is for occasional checking on solutions. I was a bit surprised that the meter needed calibration solutions. (This is my first such device however)Even a relatively small number of such solutions was nearly $100. Not complaining, as the seller was very helpful but I just was not knowledgeable about the need for these solutions. Meter has worked as intended and given the results expected and needed.

14 of 16 people found the following review helpful:

2.0 out of 5 stars Shelf storage:, August 20, 2010

By 

Edward Paquette (Canton, North Carolina, US) - See all my reviews

Amazon Verified Purchase

This review is from: Hanna Instruments HI 98121 Combination pH and ORP Temperature Tester (Misc.)

Hi, This is the second instrument I have purchased and I found out that unless the PH electrode is kept wet failure is imminent. I don't know how long you will be able to keep the instrument HI98121 shelf but if too long you might receive all of them back. The one I received today was so dry the sponge was stuck to the bulb!
Edward PaquetteHanna Instruments HI 98121 pH/ORP/Temperature Tester

3 of 3 people found the following review helpful:

5.0 out of 5 stars Good meter, get buffer solutions, July 26, 2011

By 

akasurreal (Highlands Ranch, CO United States) - See all my reviews

Amazon Verified Purchase

This review is from: Hanna Instruments HI 98121 Combination pH and ORP Temperature Tester (Misc.)

I have never bought a pH meter before, but after looking around settled on this one. It works great and does exactly what I needed. I bought it for measuring urine and saliva pH. I took the advice of others and did make sure to buy the 4.01 and 7.01 Buffer solutions for calibrating.