Started to create milestones, we, Auro Electronics India Pvt. Ltd marked our presence in the year 1991 and operate in the manufacturing/servicing of measurement information technology to the agricultural market since 24 years. Our quality services products have been always appreciated by our clients. Our spontaneous attitude and confident approach in offering an excellent range of Weather Trackers, Soil Moisture and Quality Measurement, Integrated Pest Management Tools, WatchDog Sensors And Accessories, Nutrient Management Tools, USB Data Loggers, Humidity Data Loggers, USB Water Quality Sensors, Temperature Loggers, Data Loggers, Electronic Software, CO2 Monitors, Digital Panel Meters, Data Acquisition System has deepened our roots in the market. We, Auro Electronics India Pvt. Ltd breathe with the aim of fully satisfying our clients with our high-quality products services. We are a unit of highly experienced professionals, all of them contributing at the best of their potentials to offer the highest degree of efficiency and client satisfaction.

2. Appearance
 All 6 meters standardized to same shape
 New form is identical to previous version of the Nitrate meter
 Three buttons (On/Off, Measure, Calibrate)
 Scoop sensor with lid

3. Performance Comparison
 Comparison tests run between Cardy and LAQUA meters
 Output from meters correlated well with each other

4. Compatibility
 Calibration solutions for LAQUA meters are compatible with
Cardy equivalent
 Sensor replacement for Cardy meters
• LAQUA NO3
-
and pH sensors are compatible with Cardy meters
• Other Cardy sensors will be available for 7 years
 In most cases, item numbers for LAQUA meters are the
Cardy item number plus an “L”

5. Changes from Cardy Meters
 Larger temperature range
 20% larger font size on LCD
 Battery life reduced from 500 hours
continuous use to 200 (100 for EC meter)
 Waterproof (IP67)
• Can be submerged to depth of 1 meter for 30 minutes
 Note: Cannot be used under water
• Less need for sampling sheets
 Na+
solutions now sold individually
 All meters now have a Special Setting Mode

6. Special Setting Mode
 Meter Specific
• Display units
• Number of calibration
points

7.  pH Meter
• Item # 2103AL
 Replaces Cardy item # 2103A
• New feature
 Selectable display range – 0.1 or 0.01
Product Line-up
Item # 2103ALItem # 2103A

8.  Conductivity Meter
• Item # 2205L
 Replaces Cardy item # 2205
 Automatically changes range depending on the salinity of the substance
– Option to calibrate at 12.9mS/cm for high conductivity applications
• New features
 2-point calibration
 Waterproof
Product Line-up
Item # 2205LItem # 2205

9.  NO3
-
Meter
• Item # 2305GL
 Replaces Cardy item # 2305G
• No new features
Product Line-up
Item # 2305GLItem # 2305G

10.  Na+
Meter
• Item # 2500GL
 Replaces Cardy item # 2500
• New features
 Waterproof
 Digital calibration
 Temperature range to 40o
C
Product Line-up
Item # 2500GL
Item # 2500

11. Product Line-up
 K+
Meter
• Item # 2400GL
 Replaces Cardy item # 2400
• New features
 Waterproof
 Digital calibration
 Temperature range to 40o
C
Item # 2400GL
Item # 2400

12.  Ca2+
Meter
• Item # 2450L
 New to product line-up
• Features
 Waterproof
 Digital calibration
 Temperature range to 40o
C
Product Line-up
Item # 2450L

13. Calibration
 Use standard solutions provided for calibration
• For accurate calibration across full range, run two-point calibration

14. 1. Press and hold the MEAS button for over
3 seconds in the Measurement mode
3. Press the MEAS button to display the
current calibration setting
2. Press the CAL button until the “CAL”
icon appears
4. Press the CAL switch until “2” (two-point
calibration) appears
Setting for Two-point Calibration
5. Press the MEAS switch to apply the settings

15. Sample Applications
 3 different methods for measuring liquids
• Immersion – in the lab
• Scoop – in the field
• Drops – for small volume as low as 0.1 mL (pH)

16. Sample Applications
 Ability to measure solids
• Note: Do not apply solids to Conductivity meter (item # 2205L)

17.  pH, ions, and salt
• Cover the 2 circles
 Conductivity
• Cover the 2 black cells
Amount of Sample

18. Operation
 Lid should be closed for calibration and liquid samples
• Sensors are light sensitive

19. Results
 Stability icon appears when results are ready
• Note: pH meter (item # 2103AL) can read 2 decimal places

20. Cleaning
 Clean sensor with tap water
• Old Cardy meters recommended sampling sheets to keep the user from scratching the sensor
• LAQUA meters have less need for sampling sheets, due to ability to easily flush solids from
sensor area
 Gently wipe the sensor