 Regular price: $90.00 Sale price: $83.00 |  Regular price: $90.00 Sale price: $83.00 |

 HANNA HI 981404N pH/TDS Monitor for Agriculture with Range up to 1990 ppm (mg/L), HI981404N, HI 981404, HI981404 Indicator HI 981404N and HI 981405N are both ideal for agricultural, horticultural and hydroponics applications where pH and TDS or pH and EC levels need to be continuously monitored for optimal plant growth. HI 981404N and HI 981405N continuously monitor and display the pH and TDS or pH and EC values of a solution on an easy to read set of dual LCD's. The HI 1286 gel filled pH electrode is designed with the BNC connector protected behind a waterproof sheath and when exhausted is replaceable. The unique design of the electrode guarantees greater resistance to clogging in fertilizer solutions with high concentrations of phosphate, nitrate, etc. TDS measurements are performed using the 4-4-2 conversion factor of 0.7 so you do not need to convert the readings. Both models are equipped with a grounding bar to ensure more accurate pH measurements and longer electrode life. HI 981404N and HI 981405N are compact and easy to install and use. This makes them ideal for all continuous monitoring applications.
Range 0.0 to 14.0 pH; 0 to 1990 ppm (mg/L)
Resolution 0.1 pH; 10 ppm (mg/L)
Accuracy ±0.2 pH; ±2% F.S.
Calibration manual, 1 or 2 points (pH);
manual, 1 point (TDS)
Temperature Compensation automatic, 5 to 50°C
(41 to 122°F) - TDS only
EC/TDS Conversion Factor 0.7 ppm = 1 µS/cm
Probe HI 7634 (TDS probe), HI 1286 (pH electrode)
and HI 1283 (matching pin) - All included
Input Impedance 1012 Ohm
Power Supply 12 Vdc power adapter (included)
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 160 x 110 x 35 mm (6.3 x 4.3 x 1.4")
Weight 300 g (10.6 oz.) Regular price: $158.00 Sale price: $135.00 | 
 HANNA HI 981405N pH/EC Monitor for Agriculture with Range up to 9.99 mS/cm, HI981405N HI 981405 HI981405 Indicator HI 981404N and HI 981405N are both ideal for agricultural, horticultural and hydroponics applications where pH and TDS or pH and EC levels need to be continuously monitored for optimal plant growth. HI 981404N and HI 981405N continuously monitor and display the pH and TDS or pH and EC values of a solution on an easy to read set of dual LCD's. The HI 1286 gel filled pH electrode is designed with the BNC connector protected behind a waterproof sheath and when exhausted is replaceable. The unique design of the electrode guarantees greater resistance to clogging in fertilizer solutions with high concentrations of phosphate, nitrate, etc. TDS measurements are performed using the 4-4-2 conversion factor of 0.7 so you do not need to convert the readings. Both models are equipped with a grounding bar to ensure more accurate pH measurements and longer electrode life. HI 981404N and HI 981405N are compact and easy to install and use. This makes them ideal for all continuous monitoring applications.
Range 0.0 to 14.0 pH; 0.00 to 9.99 mS/cm
Resolution 0.1 pH; 0.01 mS/cm
Accuracy ±0.2 pH; ±2% F.S.
Calibration manual, 1 or 2 points (pH);
manual, 1 point (EC)
Temperature Compensation automatic, 5 to 50°C
(41 to 122°F) - EC only
Probe HI 7632 (EC probe), HI 1286 (pH electrode)
and HI 1283 (matching pin) - All included
Input Impedance 1012 Ohm
Power Supply 12 Vdc power adapter (included)
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 160 x 110 x 35 mm (6.3 x 4.3 x 1.4")
Weight 300 g (10.6 oz.) Regular price: $158.00 Sale price: $135.00 |