HI98131 Combo Tester is waterproof and measures pH/EC/PPM/Temp.  This pocket sized tester does everything that the HI9814 Combo Meter can do.

• All measurements in a single, hassle-free tester.
• Quick Cal combo solution calibrates pH and conductivity all at once with a single solution.
• Easily replaceable pH electrode  
• Simplified menu compared to the past black combo pen (HI98129)

• FEATURES AT-A-GLANCE

  • 3 sensors in a single meter
  pH electrode with extractable junctionExposed temperature probe for faster EC/TDS readings
  • Waterproof
  Designed to withstand the harsh grow room environments. 
  • Wide pH Range
  pH range is from 0.00 to 14.00 pH
  • Selectable EC to TDS conversion factor
  Choice of either a 0.5 or 0.7 conversion factor0.7 (700 CF) conversion factor is for an EC reading of 1.00 mS/cm = 700 ppm
  • Automatic Temperature Compensation
  All readings are compensated for variations in temperature
  • Stability indicator
  Meter displays a clock tag that will disappear when the reading has achieved stability
  • HOLD button
  Freezes reading on the display to allow recording of measurement
  • BEPS (Battery Error Prevention System
  Meter will automatically shut off if there is not enough power to get an accurate measurement
  • Battery % level at startup
  • Low Battery Indicator
   

  pH Range	0.00 to 14.00 pH
  pH Resolution	0.01 pH
  pH Accuracy	±0.1 pH
  pH Calibration	automatic, at one or two points using standard buffers (pH 4.01, 7.01,10.01); one point calibration using quick calibration solution
  Conductivity Range	0.00 to 6.00 mS/cm
  Conductivity Resolution	0.01 mS/cm
  Conductivity Accuracy	±2% F.S.
  TDS Range	0 to 3000 ppm (500 CF); 0 to 3999 ppm (700 CF)
  TDS Resolution	10 ppm (mg/L)
  TDS Accuracy	±2% F.S.
  Temperature Range	0.0 to 60.0°C / 32.0 to 140.0°F
  Temperature Resolution	0.1°C / 0.1°F
  Temperature Accuracy	±0.5°C /±1°F
  Temperature Compensation	pH: automatic; EC/TDS: automatic with β set at 1.9%/°C
  EC/TDS Calibration	automatic, one-point at 1.41 mS/cm or 5.00 mS/cm; one point calibration using quick calibration solution
  TDS Conversion Factor	0.5 (500 ppm) or 0.7 (700 ppm)
  Battery Type/Life	1.5V (4) / approx. 100 hours of continuous use, auto-off after 8 minutes of non-use
  Auto-off	after 8 minutes, 60 minutes, disabled
  Environment	0 to 50°C (32 to 122°F); RH max 100%
  Dimensions	163 x 40 x 26 mm (6.4 x 1.6 x 1.0’’)
  Weight	100 g (3.5 oz.)
  Ordering Information	HI98131 is supplied with HI73127 pH electrode, HI73128 electrode removal tool, batteries (4), instructions and quality certificate.

• • Auto-off - Selectable time before meter will automatically shuts off to conserve battery life. Options are after 8 minutes, 60 minutes , or disabled.
• When the level is below 5%, the  battery symbol on the LCD blinks to indicate a low battery condition.
•  
•  
•  
• Temperature displayed in oC or oF along with pH, EC or TDS reading
•  
• 0.5 (500 CF) conversion factor is for an EC reading of 1.00 mS/cm = 500 ppm
• 
  
• 
  
• Amperometric EC/TDS sensor