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

Performance Comparison

Comparison tests run between Cardy and LAQUA meters Output from meters correlated well with each other

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”

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

Special Setting Mode

Meter Specific• Display units

• Number of calibration points

pH Meter• Item # 2103AL

Replaces Cardy item # 2103A

• New feature Selectable display range – 0.1 or 0.01

Product Line-up

Item # 2103ALItem # 2103A

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

NO3- Meter

• Item # 2305GL Replaces Cardy item # 2305G

• No new features

Product Line-up

Item # 2305GLItem # 2305G

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

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

Ca2+ Meter• Item # 2450L

New to product line-up

• Features Waterproof Digital calibration Temperature range to 40o C

Product Line-up

Item # 2450L

Calibration

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

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

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)

Sample Applications

Ability to measure solids• Note: Do not apply solids to Conductivity meter (item # 2205L)

pH, ions, and salt• Cover the 2 circles

Conductivity• Cover the 2 black cells

Amount of Sample

Operation

Lid should be closed for calibration and liquid samples • Sensors are light sensitive

Results

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

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