The HI991301 is designed to measure pH, conductivity (EC), total dissolved solids (TDS), and temperature with a single probe. From setup to calibration all operations are performed with just two buttons. The meter is waterproof and rated for IP 67 conditions.
The HI12883 pre-amplified multiparameter probe features an easy-to-clean sensor and a cloth junction that can be renewed to increase the life of the probe. To ensure against interference from transient electrical noise, a solid-state amplifier is integrated into the HI12883.
User-selectable features include different TDS factors from 0.45 to 1.00 and a range of temperature coefficients (β) from 0.0 to 2.4% for greater consistency and reproducibility. Standardized buffer recognition values are also selectable.
These instruments easily fit in the palm of your hand and the bottom probe connection ensures the electrode cable doesn’t get in your way. The large, multi-level LCD displays the primary reading, temperature, and calibration guides simultaneously.
HI12883 Multiparameter Probe
The HI12883 multiparameter probe includes pH, EC/TDS, and temperature measurement. A solid-state pre-amplifier is integrated into the probe to protect against interference from transient electrical noise.
Amperometric conductivity probe
Built-in temperature sensor
The sensor is easy to clean and maintain by design
pH sensor with extendable cloth junction
The HI12883 multiparameter probe features a cloth junction that can be pulled longer, effectively increasing the life of the probe
3 sensors in a single probe
pH electrode - Preamplified for resistance to electrical noise including that generated by pumps and ballast
EC/TDS sensor - amperometric two pole design
Temperature - NTC sensor for accurate temperature measurement and compensation
Designed to withstand the humidity of a growing environment
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 factor
0.5 (500 CF) conversion factor is for an EC reading of 10 mS/cm = 5 ppt
0.7 (700 CF) conversion factor is for an EC reading of 10 mS/cm = 7 ppt
Automatic Temperature Compensation
All readings are compensated for variations in temperature
Temperature displayed in oC or oF along with pH, EC or TDS reading
Meter displays a clock tag that will disappear when the reading has achieved stability
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
When the level is below 5%, the battery symbol on the LCD blinks to indicate a low battery condition.
User selectable automatic shut-off ff to conserve battery life. Options are after 8 minutes, 60 minutes , or disabled.
-2.00 to 16.00 pH; -2.0 to 16.0 pH
0.01 pH; 0.1 pH
±0.02 pH; ±0.1 pH
automatic, at one or two points with two sets of standard buffers (pH 4.01 / 7.01 / 10.01 or pH 4.01 / 6.86 / 9.18)
pH Temperature Compensation
automatic 0 to 50 °C; 32 to 122 °F
pH CAL Check (electrode diagnostics)
probe condition indicator
pH Sensor Check
±825 mV (pH‐mV)
1 mV (pH‐mV)
±1 mV (pH‐mV)
0.00 to 20.00 mS/cm
automatic, one-point at 12.88 mS/cm
0.00 to 10.00 ppt (g/L)
0.01 ppt (g/L)
EC/TDS Temperature Compensation
Temperature Correction Coefficient
β selectable from 0.0 to 2.4 %/ °C with 0.1 increments
EC to TDS Conversion Factor
selectable from 0.45 to 1.00 with 0.01 increments
‐5.0 to 105.0 °C; 23.0 to 221.0 °F
HI12883 PVC body, pre-amplified multiparameter probe with internal temperature sensor, quick connect DIN connector and 1m cable
user selectable: after 8 min, 60 min or disabled
1.5V (3) AAA / approximately 600 hours of continuous use
0 to 50°C (32 to 122°F); RH max 100%
154 x 63 x 30 mm (6.1 x 2.5 x 1.2”)
196 g (6.91 oz.)
HI991301 is supplied complete with HI12883 pH/EC/temperature probe, pH 4.01 calibration buffer sachet (1), pH 7.01 calibration buffer solution sachet (1), HI70030 12.88 mS/cm calibration solution sachet (1), HI70038 6.44 ppt calibration solution sachet (1), HI700601 electrode cleaning solution sachet (2), 100 mL beaker (1), batteries, calibration certificates for both meter and probe, instruction manual, and rugged thermoformed carrying case.