SUMMARY
The LAQUAtwin NO3-11C is a compact nitrate ion meter designed specifically for measuring nitrate concentration in crops.
Extracted crop sap can be applied directly to the flat ion-selective sensor, allowing nitrate concentration to be measured quickly from only 0.3 mL of sample.
The meter covers a wide nitrate measurement range and includes dedicated crop standard solutions and the equipment required for crop sap extraction. It is suitable for monitoring crop growth, nutrient conditions, and cultivation management in the field.
FEATURES
- Designed specifically for nitrate measurement in crops
- Measures nitrate ion concentration from only 0.3 mL of crop sap
- Measurement possible from 0.05 mL when using Sampling Sheet B, sold separately
- Flat nitrate ion-selective sensor
- Measures nitrate ion (NO3−) and nitrate-nitrogen (NO3-N)
- Wide nitrate measurement range from 6 to 9900 ppm
- Dedicated 300 ppm and 5000 ppm crop standard solutions included
- Up to two calibration points
- Low- and high-concentration calibration points can be adjusted
- Temperature sensor adjustment function
- Auto Hold function
- Auto Stability function
- Temperature and mV measurement modes
- Measured-value multiplication compensation
- Backlit monochrome digital LCD
- Automatic power-off after 30 minutes
- Remaining battery level display
- IP67 water-resistant construction
- Replaceable sensor
- Crop measurement kit and carrying case included
CROP MEASUREMENT
The included crop measurement kit provides the main equipment required to extract crop sap and apply it directly to the flat nitrate ion sensor.
Prepare the Crop Sample
Collect the appropriate part of the crop and use the included crop sap press to extract sufficient liquid for measurement.
Apply the Extracted Sap
Apply the extracted crop sap directly to the flat sensor using one of the included 1 mL droppers. At least 0.3 mL is required for direct measurement.
Measure and Compare
Close the light shield cover and measure the nitrate concentration. For reliable comparisons, use the same sampling and preparation procedure for each measurement.
INCLUDED CROP MEASUREMENT KIT
- Five 1 mL droppers
- One 250 mL wash bottle
- One crop sap press
- Three sample cups
- Instruction manual
- Quick manual
- Carrying case
SPECIFICATIONS
| Model | LAQUAtwin-NO3-11C |
|---|---|
| Intended Use | Nitrate measurement in crops |
| Measurement Principle | Ion-selective electrode method |
| Required Sample Volume |
0.3 mL or more Measurement from 0.05 mL is possible when using Sampling Sheet B, sold separately*1 |
| Measurement Range |
Nitrate ion (NO3−): 6 to 9900 ppm (mg/L) Nitrate-nitrogen (NO3-N): 1.4 to 2200 ppm (mg/L) |
| Resolution |
0 to 99 ppm: 1 ppm 100 to 990 ppm: 10 ppm 1000 to 9900 ppm: 100 ppm |
| Temperature Display Range / Resolution | 0 to 50°C / 0.1°C |
| Calibration |
Up to 2 points Default calibration values: 300 ppm and 5000 ppm |
| Accuracy | ±10% of the reading*2 |
| Main Functions |
Adjustable low- and high-concentration calibration points Multiplication compensation coefficient: 0.01 to 9.90 Concentration, temperature, and mV display modes Temperature sensor adjustment function Auto Hold Auto Stability function Automatic power-off after 30 minutes Remaining battery level display Replaceable sensor |
| Water Resistance | IP67 equivalent*3 |
| Display | Custom monochrome digital LCD with backlight |
| Operating Environment | 5 to 40°C, 85% relative humidity or less, non-condensing |
| Power Supply | Two 3 V CR2032 coin-type lithium batteries |
| Battery Life | Approximately 400 hours of continuous use with the backlight switched off*4 |
| Main Material | ABS resin |
| Dimensions and Weight |
W164 × H29 × D20 mm, excluding protruding parts Approximately 50 g, excluding batteries |
| Included Accessories |
Two CR2032 coin-type lithium batteries 300 ppm crop-specific nitrate ion standard solution, 14 mL × 1 bottle 5000 ppm crop-specific nitrate ion standard solution, 14 mL × 1 bottle Five 1 mL droppers One 250 mL wash bottle One crop sap press Three sample cups Instruction manual Quick manual Carrying case |
| Main Consumables |
S040: Nitrate ion sensor Y041: 5000 ppm nitrate ion standard solution Y042: 300 ppm nitrate ion standard solution |
*1 Measurement is possible from 0.05 mL when using Sampling Sheet B. Sampling Sheet B is sold separately for the NO3-11C. Close the light shield cover during measurement.
*2 Indicates repeatability when the same standard solution is measured after calibration with the standard solution. Standard solution error and rounding error of ±1 digit are not included.
*3 Equivalent to IP67. The meter will not fail after immersion in water at a depth of 1 m for 30 minutes. It cannot be used underwater.
*4 Battery life is reduced to approximately one-third when the backlight is used. The backlight remains illuminated for approximately 20 seconds.
Calibration and Crop Measurement Notes
Use the dedicated 300 ppm and 5000 ppm crop-specific nitrate standard solutions supplied for the NO3-11C.
Nitrate-nitrogen (NO3-N) represents the amount of nitrogen contained in nitrate. It is not a measurement of total nitrogen.
Measurement results may be affected by ions and other substances contained in the crop sap.
If dilution or another form of sample preparation is required, keep the preparation method and dilution ratio consistent when comparing results.
For reliable comparisons, keep the crop variety, sampled plant part, growth stage, sampling time, extraction method, calibration procedure, and measurement conditions consistent.