C821-MDA-EC

Conductivity / TDS / Resistivity Transmitter and Controller

Function: Conductivity (EC) / Total Dissolved Solids (TDS) / Resistivity (ER) Transmitter and Controller

EC Measuring Range:

• 0.01 electrode: 0 ÷ 20.00 μS/cm or 0.05 ÷ 20.00 MΩ·cm
• 0.1 electrode: 0.20 ÷ 200.0 μS/cm
• 1.0 electrode: 2.00 ÷ 2000 μS/cm (up to 20,000 μS/cm)
• 10.0 electrode: 0.02 ÷ 20.00 mS/cm

(Not recommended for use in pure water below 1 μS/cm)

AO Output: 4 ÷ 20 mA Isolated - Configurable over EC/TDS/ER measurement range - Maximum load 750 Ω - Accuracy ±0.2% FS

Communication: Isolated RS485 - Modbus RTU Protocol

DO Output: 2x SPDT Relay Contacts (Normally Open and Normally Closed) - 3A / 250 Vac

Power Supply: AC (220 Vac ±10%, 50/60 Hz) / DC (24 Vdc ±10%)

Power Consumption: 5 W (max)

Accuracy: 2.0%

Measurement Error: EC/TDS/ER (±1% FS)

Temperature Compensation: Manual & Automatic (-10 ÷ +130 °C) with sensors:

• NTC10K: accuracy ±0.3 °C
• PT1000: accuracy ±0.3 °C

Display: LCD with switchable backlight

Working Ambient Temperature: 0 ÷ +60 °C

Ambient Humidity: 10% ÷ 85% (Non-Condensing)

Storage Temperature: -15 ÷ +65 °C

Housing: Plastic - Panel Mount Installation

Dimensions: W 100 x H 100 x D 150 mm - Panel cutout: 92.5 x 92.5 mm

Electrical Interface: Cable glands: 2 x M16 × 1.5 mm + 1 x M12 × 1.5 mm