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Hanna Instruments HI 9813-6N Waterproof pH/EC/TDS Temperature Meter Clean and Calibration Check for Growers, 0 to 50 Degree C, 9V Battery

4.3 4.3 out of 5 stars 215 ratings

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Purchase options and add-ons

  • Starter set with portable, water-resistant meter for testing pH, electroconductivity, and total dissolved solids, provided with solutions and sachets
  • Calibration check function to validate instrument performance
  • Automatic temperature compensation (ATC) to eliminate the need for extra calculations
  • Alert system when low battery and potential measurement error
  • On-screen user and calibration guides

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Item model number ‏ : ‎ HI9813-6N
  • Batteries ‏ : ‎ 1 9V batteries required.
  • Date First Available ‏ : ‎ May 17, 2004
  • Manufacturer ‏ : ‎ Hanna Instruments
  • ASIN ‏ : ‎ B003L77LKG
  • Customer Reviews:
    4.3 4.3 out of 5 stars 215 ratings

Product Description

HI9813-61

pH/EC/TDS/Temperature meter with CAL Check

The HI9813-61 is a portable, water-resistant meter, designed for measuring pH, EC/TDS, and temperature when paired with its respective probe, the HI1285-61. The meter is easy to use, with dedicated keys for measurement modes that are clearly displayed on the LCD, and knobs for 1-point calibration of pH and EC. On-screen tutorial messages guide the user through calibration and measurement.

Main Features

  • 3-in-1 combination probe with pH, EC/TDS, and temperature sensors
  • CAL Check
  • Best for hydroponics, greenhouses, farming, and ground water app

The HI9813-61 portable meter features a large LCD that displays either pH, EC, TDS or temperature readings along with tutorial instructions. The pH readings are displayed with a 0.1 resolution and an accuracy of +/-0.1 pH while the EC and TDS readings are displayed with a 0.01 mS/cm and 1 ppm (mg/L) resolution and 2% full-scale accuracy. The EC range of the HI9813-5 is from 0.00 to 4.00 mS/cm and TDS is from 0 to 1999 ppm. The temperature correction coefficient (β) is fixed at 2 %/°C and allows for automatic temperature compensated measurements of EC and TDS. The HI9813-61 is a basic pH/EC/TDS meter that is calibrated manually to a single point with the use of two trimmers. pH is calibrated to pH 7.01 while EC/TDS is calibrated to either 1.41 mS/cm (1413 µS/cm) or 1500 ppm. The LCD screen has a battery life indicator as well as on-screen tutorial messages. The supplied HI1285-61 probe is a polypropylene body, amplified pH electrode with a built-in EC/TDS and temperature sensors. The amplifier for the pH electrode prevents interference from humidity and electrical noise from common sources including from motors, ballasts or pumps. The HI9813-61 is a versatile meter for the agricultural, greenhouse and hydroponic uses.

pH/EC/TDS/Temperature meter with CAL Check

HI1285-61 polypropylene body amplified pH electrode with built-in EC/TDS and temperature sensors

The HI9813-61 is supplied with a polypropylene body pH/EC/TDS/temperature probe. The pH, EC, TDS, and temperature sensor are housed in a single body that connects to the meter with a DIN connector.

The pH electrode circuit has a built-in amplifier that will reduce the effects of electrical noise on the high impedance-pH measurement. Examples of sources of electrical noise include motors, ballasts, and pumps which are common in greenhouses.

The EC/TDS readings are performed by an amperometric sensor. An alternating voltage is applied to the sensor and the amount of current that passes between the two stainless steel pins is dependent upon the number of salts (fertilizer) present. A greater amount of salt present results in an increase in conductance.

Features at-a-glance

Waterproof

Automatic Temperature Compensation

  • All readings are compensated for variations in temperature

EC to TDS conversion factor

  • Factor automatically adjusts from 0.56 to 0.78 based on actual EC readings
  • Factor based on 442 curve for natural water

Low Battery Indicator

pH Range 0.0 to 14.0 pH
pH Resolution 0.1 pH
pH Accuracy (@25°C/77°F) ±0.1 pH
pH Calibration Manual, 1-point
Temperature Range 0.0 to 70.0°C
Temperature Resolution 0.1°C
Temperature Accuracy 25°C/77°F ±0.5°C
Temperature Calibration Automatic from 0 to 70°C with ß=2% / °C
EC Range 0 to 4000 µS/cm
EC Resolution 0.01 mS/cm
EC Accuracy (@25°C/77°F) ±2% F.S.
EC Calibration Manual, 1-point
TDS Range 0 to 1999 ppm (mg/L)
TDS Resolution 1 ppm
TDS Accuracy (@25°C/77°F) ±2% F.S. ppm
TDS Conversion Factor Variable, automatically adjusted from 0.56 to 0.78 based on actual EC readings (based on 442 curve for natural water)
TDS Calibration Manual, 1-point
Power Supply 1 x 9V Alkaline / approximately 150 hours of continuous use
Environment 0 to 50°C (32 to 122 °F); 100% RH
Dimensions 145 x 80 x 36 mm (5.7 x 3.1 x 1.4“)
Weight 230 g (8.1 oz.)
Recommended Probe HI1285-61 combination, amplified pH /EC/TDS/temperature probe with built-in temperature sensor, 8-pin DIN connector (with CAL Check) and 1 m (3.3’) cable

Product guides and documents

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Customer reviews

4.3 out of 5 stars
4.3 out of 5
215 global ratings

Customers say

Customers like the ease of use and quality of the PH meter. They mention it's simple to use, responds quickly to changes, and is built well. That said, some complain about the seal. Opinions are mixed on accuracy and performance.

AI-generated from the text of customer reviews

19 customers mention19 positive0 negative

Customers find the PH meter easy to use and calibrate. They say it responds quickly to changes, has detailed instructions, and is reliable. Customers also appreciate the first-class tech support and the easy calibration knobs on the front of the meter.

"...Easy to set up and easy to use." Read more

"...It's smaller, fits the hand comfortably, calibrates in a few seconds with a single pH buffer and EC standard...." Read more

"Very accurate meter that very easy to use." Read more

"...It was such a great decision, because the newer unit is a dream to use and calibrate. The temp sensor and check feature is so nice to have...." Read more

14 customers mention10 positive4 negative

Customers like the quality of the lab supply. They mention that it is reliable, built well, and stable. Some say that it meets their expectations and fulfills their needs.

"I have used many pH meters and this is by far the best. It is very stable and does not need to be calibrated often as others, It is also very water..." Read more

"...Since then I have been pleased in it's accuracy and reliability...." Read more

"...Quality just doesn't seem to be there or the probe was defective. I returned this for a refund. Thank God for Amazon's return policy." Read more

"Good product, it met our expectation and fulfilled our needs." Read more

24 customers mention14 positive10 negative

Customers are mixed about the accuracy of the meter. Some mention it's very accurate and easy to use, while others say that the readings seem to be inaccurate and they're not able to calibrate it to be accurate.

"...It is very stable and does not need to be calibrated often as others, It is also very water resistant and temperature compensated...." Read more

"...Today the PH stopped working properly and would only read 4.4 PH for any solution it was placed in...." Read more

"Very accurate meter that very easy to use." Read more

"...: the display is big and readable but 2/3rds of it is dedicated to calibration instructions, which are practically unnecessary...." Read more

21 customers mention13 positive8 negative

Customers are mixed about the performance of the lab supply. Some mention it has worked great, is a great device, and has solid performance, while others say that it never worked properly and the PH portion of the meter stopped working properly. The readings, after a short time, they begin to fail.

"I bought this meter a few months ago. It has worked great. I love the fact that it's waterproof and I don't have to worry about getting it wet...." Read more

"Works well, the reason I gave 4 stars is because of the cover for the probe, it does not give an airtight seal therefore it leaks out the storage..." Read more

"...Thank you and have a great day."Even though the unit had NEVER worked properly, they would not take it back. I had the unit for 39 days...." Read more

"Solid performance but not so easy to use. The cable from the device to the probe is very stiff...." Read more

4 customers mention0 positive4 negative

Customers are dissatisfied with the seal of the lab supply. They mention that it's only semi air tight, the seal on the back is broken, and it'll not be waterproof. The cap for the probe has no seal lock, making it easy for liquid to leak out of the storage solution.

"...I gave 4 stars is because of the cover for the probe, it does not give an airtight seal therefore it leaks out the storage solution, I have had this..." Read more

"...But it's only SEMI air tight. There is no seal, it's just a slip on cap so when you put the meter away the pressure in the cap keeps pushing storage..." Read more

"...The last problem is the cap for the probe has no seal lock with the probe so it is easy for it to get loose and the probe dry out...." Read more

"...I bought back in Dec and my return date is up. It doesnt, the seal on the back is broken and it qont be waterproof. All I get is a 1 nothing works." Read more

4 customers mention0 positive4 negative

Customers are dissatisfied with the waterproofness of the lab supply. They mention that the sensor took in water and gave the same reading.

"...seal lock with the probe so it is easy for it to get loose and the probe dry out...." Read more

"...I use this for my swimming pool and testing my well water. Not water proof and not drop resistant!" Read more

"...It doesnt, the seal on the back is broken and it qont be waterproof. All I get is a 1 nothing works." Read more

"...1st probe had a short in the wire, 2nd and 3rd ones the sensor took in water and gave the same reading no matter what...." Read more

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Top reviews from other countries

Amazon Customer
1.0 out of 5 stars Not Passing Test
Reviewed in Canada on November 25, 2023
Jon
1.0 out of 5 stars Ph won't calibrate and seems was used before? Missing cleaning solution as advertised in booklet.
Reviewed in Canada on December 28, 2023