- 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
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Hanna Combo pH/EC/TDS/C/PPM Tester HI98129
|Price:||$156.99 & FREE Shipping. Details|
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Specifications for this item
|Brand Name||Hanna Instruments|
|EAN||0787461659175 , 0793573622419 , 0799331544443 , 5053184545428|
|Item Weight||2.88 ounces|
|Measurement Type||pH , Temperature|
|Number of Items||1|
|Part Number||HI 98129|
|UPC||799331544443 , 793573622419 , 787461659175|
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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
Top Customer Reviews
Also I would check out a four star review posted by orion as he explained perfectly why It may not be the best option for you if you plan to use it as an ec meter.
Ah, also - this type eats the batteries like there is no tomorrow. My old Oaktons used to run of the same set of batteries for 6-8 months, while this unit drops 1-2% of battery power every day ... which means the expensive batteries will have to be replaced every 2 months.
Among the advantages (arguably): easier to calibrate than most other pocket conductivity meters. But, these HAVE to use certain calibration solutions, specifically 1,413 uS. So, if you don't happen to have 1,413 uS only, don't even try with your 3,900 uS or whatever else you may have.
"[...] did not hold calibration between on / off cycle. After being calibrated using 4.01 and 7.01 buffer solutions and turned off and back on, PH readings were off by .40 to .50. In other words the previously calibrated 7.01 buffer solution would read 7.40 to 7.50. This is way more than the advertised accuracy of + or - .05."
I also made a test where I inserted the meter in the 4.01 pH buffer and I did NOT remove the meter from the solution when the small clock disappeared (which signals that the reading is stable). The reading went slowly from 3.97 to 4.39, without me changing anything.
The electrode takes a very very long time to stabilize its reading.
Most Recent Customer Reviews
This item has broken in less than 3 months use. Maybe a total of 50 times being used. Buy a blue lab! Better warranty better productPublished 8 days ago by Ryan
Works extremely well. Great for checking any type of nutrients organic or otherwise. Highly recommended for the price. ...Published 4 months ago by Ric
Sadly I to have to agree w/alot of you.I also used to sing their praises,but after haveing a reliable 1st pen almost 10yrs ago,I purshased another 1 only to have to return it... Read morePublished 4 months ago by Amazon Customer
Excellent - solid build quality and functions perfectly!
Highly recommended for any need of testing PPM, EC, and PH. Read more
Hanna customer support is non existent. Ignored all attempts to contact them.
I have been through two of these pens. Read more