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  • Hanna Instruments HI 991404 pH/EC/TDS/Temperature Monitor, Low Range EC and TDS
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Hanna Instruments HI 991404 pH/EC/TDS/Temperature Monitor, Low Range EC and TDS

8 customer reviews

List Price: $246.95
Price: $184.50 & FREE Shipping
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Specifications for this item
Brand Name Hanna Instruments
Part Number HI 991404
Number of Items 1
EAN 0870883005115
Import Designation Made in USA
Measurement Type pH , Oxidation Reduction Potential (ORP) , Ion Selective Electrode (ISE) , Temperature
Style Name Portable
UNSPSC Code 42181904
UPC 870883005115

The HI 991404 pH/EC/TDS/temperature meter is a multi-parameter device for monitoring nutrient ... Read full product description


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Product Features

  • Non-clogging double junction pH electrode for prolonging meter life
  • Automatic calibration and temperature compensation for ease of use
  • Self-check and stability indicator to indicate when to take a reading
  • Large LCD screen for readability
  • 12 Vdc power adapter for prolonged use


Product Details

User Manual [377kb PDF]
  • Shipping Weight: 2 pounds (View shipping rates and policies)
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B002ZG8L7Q
  • Item model number: HI991404
  • Average Customer Review: 2.9 out of 5 stars  See all reviews (8 customer reviews)
  • Amazon Best Sellers Rank: #162,784 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Frequently Bought Together

Hanna Instruments HI 991404 pH/EC/TDS/Temperature Monitor, Low Range EC and TDS + Hanna Instruments HI 98129 Waterproof pH/Conductivity/TDS Tester
Price for both: $319.14

These items are shipped from and sold by different sellers.

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Product Description

The HI 991404 pH/EC/TDS/temperature meter is a multi-parameter device for monitoring nutrient parameters in hydroponics, greenhouses, and horticultural applications.

Featuring a large easy-to-read LCD screen, automatic calibration and temperature compensation, the tester provides fast and accurate pH, electro-conductivity (EC), Total Dissolved Solids (TDS) and temperature readings. A self-check assures the device is in working condition, while the internal stability feature indicates when to take a reading. A hold function allows the user to freeze the display in order to record results. The HI 991404 also features a non-clogging double junction pH electrode and a conductivity probe.

The HI 991404 tester measures temperatures of 0.0 to 60.0 degrees C (32 to 140 degrees F) + or - 0.5 degrees C (+ or - 1 degrees F)/RH max 95% (+ or - 0.1 degrees C / 0.1 degrees F), and has a range of 0.0 to 14.0 pH (+ or - 0.1) with a resolution of 0.1 pH. EC range is 0 to 3999uS/cm (+ or - 2% F.S), with a resolution of 1uS/cm. TDS range is 0 to 2000pp(mg/L) (+ or - 2% F.S), with a resolution of 1ppm. The EC/TDS conversion factor is adjustable from 0.45 to 1.00. The device has an input impedance of 1E12 Ohm and operates on a 12 Vdc power adapter. The dimensions are 160 x 105 x 31 mm (6.3 x 4.1 x 1.2") and it weighs 190 g (6.7 oz.), a conveniently sized meter for taking measurements in the field. Note that the HI 991404 meter does not work with a digital ballast.

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 their products, Hanna is a vertically integrated manufacturer and does not subcontract any part of its manufacturing.

What’s in the Box?

  • HI 1293D pH electrode
  • HI 7630 probe
  • pH and EC calibration solutions
  • 12 Vdc power adapter
  • Instructions


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

29 of 29 people found the following review helpful By just on August 9, 2010
Had this unit for a few months now, and have been a more than a little disappointed with it.
First the good:
1. Back lit screen makes it easy to read in dark locations.
2. The EC/TDS meter works well and is easy to calibrate.
3. The temperature meter (built in to the EC/TDS probe) is also accurate on my unit.
4.The unit has mounting screws
5. The probes have threads for inserting into a closed system
6. Great email response from the service team

Ok Now the bad!
1. The pH probe has a non-standard plug, so you can only use this probe type. Other units use a standard BNC connector and your probe choice can be based on durability, maintenance and accuracy requirements.
2. When calibrating, you need to place both probes (pH and EC) into the calibrating solution - this means more calibration solution is wasted rinsing and submerging probes. - You will want a good 100mls of solution each time you calibrate.
3. The pH probe seems very delicate with a very poor shelf/operating life - I have tried 2 new pH probes and neither work properly. The probe it came with was dry (in the plastic bulb protector) on arrival and it had a metering range of 7.2 to 7.0. I replaced this probe for a second one (~$75) which fortunately arrived wet. This new probe reads a 4.01 solution as pH5.4 - an improvement on the first but still useless.
4. Performing two point calibration at 7.0 and 4.0 is impossible, as this unit has automatic calibration. I was told by Hanna that if the probe is not reading your 4.0 solution within a few points of 4.0, it will not set!!
Unfortunately neither of my 2 probes come close to reading a 4.01 solution anywhere near this. Hanna's opinion on this is that if the probe wont do this, it is broken!!
Read more ›
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13 of 16 people found the following review helpful By James Hooke on July 2, 2008
I got this unit and tried for days to get it to work, so I called the company Hanna and they told me you are not supose to put the probes in past the top, it doesnt say nothing about this in the directions, then the other thing is this unit won't work around a electronic ballast. Hanna should do there home work and let people know this stuff.Hanna Gro'Chek Continuous pH/TDS/EC/Temp
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4 of 4 people found the following review helpful By C.A on June 28, 2011
I Ordered this item based on reviews of hanna products and thought this should most definatly suit me for my purposes. Upon arrival all packaging was in good condition with no damage. I set my meter up to the best of my ability however the ph meter would not calibrate. I used the device regardless and hoped that maybe it was an error on my part. After about a week of use the monitor stopped being continuos and started not being anything. Its just hanging on the wall , it shuts off immediatly after being turned on and does nothing but glow a green led light. This is a peice..if I ever saw one this is it. I contacted the Hanna tech dept. They asked a few questions and havent responded since. Overall I believe they hype their own products. This was a poor decision on my part..dont make the same mistake.
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3 of 3 people found the following review helpful By Mya on May 7, 2011
Verified Purchase
I purchased 2 of the Hanna combo grochek meters last year which are supposed to have a 2 year warranty, but the first one already is off and wont re-calibrate.
Not too mention, I always new I was going to have problems with purchasing expensive items over the internet.
Amazon has no clear customer service department to help me figure out what to do about it.
SO BEWARE
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Want to discover more products? Check out these pages to see more: hanna ph/ec meter, hanna instruments or, hanna alkalinity meter, combo ph tds meter