# AGRINOVO-EC-100: Digital Conductivity Sensor

Agrinovo technical datasheet, revision 1.2 (October 2026).
PDF version: https://agrinovo.io/datasheets/sensors/AGRINOVO-EC-100_Datasheet.pdf

## 1. Overview

The AGRINOVO-EC-100 is a digital water conductivity sensor capable of measuring Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature. It integrates internal signal conditioning, linearization, temperature compensation, and digital communication.

### Key Features

- EC measurement (µS/cm)
- TDS derived (EC ÷ 2)
- Temperature compensation
- Accuracy: ±1.0% FS
- Multiple electrode constants
- Slope/intercept calibration
- RS485 Modbus-RTU
- Low power: ≤0.5W

### Applications

- Agricultural irrigation
- Hydroponics
- Aquaculture
- Water quality monitoring

## 2. Specifications

| Parameter | Specification |
|:----------|:--------------|
| **Accuracy** | ±1.0% FS |
| **Temp Compensation** | 0 to 60°C (automatic) |
| **Power Consumption** | ≤0.5W |
| **Supply Voltage** | 12-24 VDC |
| **Operating Humidity** | ≤85% RH |

### Electrode Constants and Ranges

| K Value | EC Range | TDS Range | Resolution |
|:--------|:---------|:----------|:-----------|
| 0.1 cm⁻¹ | 0.2 to 200 µS/cm | 0.1 to 100 ppm | 0.01 |
| 1.0 cm⁻¹ | 2 to 10,000 µS/cm | 1 to 5,000 ppm | 1 |
| 10.0 cm⁻¹ | 20 to 100,000 µS/cm | 10 to 50,000 ppm | 1 |

## 3. Wiring

| Wire Color | Function | Description |
|:-----------|:---------|:------------|
| **Red** | V+ | Power Supply (12-24V DC) |
| **Black** | GND | Power Ground |
| **Yellow** | RS485-A | Data+ |
| **Green** | RS485-B | Data- |

## 4. Communication Settings

| Parameter | Value |
|:----------|:------|
| **Protocol** | Modbus-RTU |
| **Baud Rate** | 9600 bps |
| **Data Bits** | 8 |
| **Parity** | None |
| **Stop Bits** | 1 |
| **Default Address** | 0x01 |

## 5. Register Map

### Measurement Registers (Function 0x03)

| Address | Description | Scaling |
|:--------|:------------|:--------|
| 0x0000 | Electrical Conductivity | Direct (µS/cm) |
| 0x0001 | Temperature | Value ÷ 10 (°C) |

### Configuration Registers (Function 0x06)

| Address | Description | Range/Notes |
|:--------|:------------|:------------|
| 0x0004 | Slope (Gain) | Value × 1000 (default: 1000) |
| 0x000B | Intercept (Offset) | µS/cm (default: 0) |
| 0x0050 | Slave Address | 0x01 to 0xFE |

## 6. Reading Data

Read 2 registers from 0x0000:

```
Request:  01 03 00 00 00 02 C4 0B
Response: 01 03 04 02 AE 01 64 9A 11
```

**Decoding:**

| Register | Hex | Decimal | Scaling | Result |
|:---------|:----|:--------|:--------|:-------|
| EC | 0x02AE | 686 | Direct | **686 µS/cm** |
| Temperature | 0x0164 | 356 | ÷10 | **35.6°C** |

**TDS Calculation:** `TDS = 686 ÷ 2 = 343 ppm`

## 7. Address Configuration

### Change Address (0x01 → 0x02)

```
Request:  01 06 00 50 00 02 08 1A
Response: 01 06 00 50 00 02 08 1A
```

### Broadcast Discovery

Use address 0xFE with only one device connected.

## 8. Calibration

### Set Slope (1.200)

Slope = 1200 (1.200 × 1000) = 0x04B0

```
01 06 00 04 04 B0 CB 7F
```

### Set Intercept (10 µS/cm)

```
01 06 00 0B 00 0A 78 0F
```

## 9. Installation Notes

**Sensor Placement**

- Stable water flow, no bubbles
- Fully submerged tip
- Correct flow orientation

**Electrical**

- Separate RS485 from power lines
- Shielded twisted pair cable
- Proper bus termination

## Ordering Information

| Part number | Description |
|:------------|:------------|
| AGRINOVO-EC-100 | Digital Conductivity Sensor |

## Revision History

| Rev | Date | Changes |
|:----|:-----|:--------|
| 1.0 | June 2026 | Initial release |
| 1.1 | August 2026 | Layout revision |
| 1.2 | October 2026 | New layout; corrected Modbus example CRC values |

## Contact

Agrinovo, https://agrinovo.io/products, contact@agrinovo.io, +972 54 688 8148 (direct / WhatsApp).
Specifications subject to change without notice.