Hanna Instruments HI 991401 pH/Temperature Monitor

  • List Price: $89.99
  • Sale Price: $100.00
  • Availability: Usually ships in 1-2 business days


  • Automatic calibration and temperature compensation for ease of use
  • Non-clogging interchangeable pH electrode to prolong life of meter
  • Large backlit LCD screen to reduce glare
  • Designed specifically for agricultural applications and handling high concentrations of phosphate and nitrate
  • Operates on 12 Vdc power adapter for prolonged use

Product Description

The HI 991401 pH/Temperature meter is a waterproof device designed specifically for measuring pH and temperature in hydroponics, and agricultural applications.

Featuring a large easy-to-read LCD screen, automatic temperature compensation, and automatic calibration (at one or two points with two sets of memorized buffers), the tester provides fast and accurate pH and temperature readings. The HI 991401 also features a non-clogging pH electrode which was designed specifically to work in fertilizer solutions with high concentrations of phosphate and nitrate. A hold function allows the user to freeze the display to record results.

The HI 991401 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. Power is supplied through a 12-Vdc power adapter and the device has an input impedance of 1E12 Ohm. At 160 x 105 x 31 mm (6.3 x 4.1 x 1.2") and 190 g (6.7 oz.), the 991401 provides a conveniently sized meter for taking measurements in the field.

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?

  • HI 1293D pH electrode
  • pH 4 and pH 7 calibration solutions
  • 12-Vdc power adapter
  • Instructions

Product Detail

  • Product Dimensions: 0.47 pounds
  • Shipping Weight: 0.47 pounds
  • ASIN: B002NX0W9G
  • Item model number:
  • Average Customer Review: Customer Reviews

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