# AGRINOVO-PH-110: Industrial pH Sensor

Agrinovo technical datasheet, revision 1.2 (October 2026).
PDF version: https://agrinovo.io/datasheets/sensors/AGRINOVO-PH-110_Datasheet.pdf

## 1. Overview

The AGRINOVO-PH-110 is an intelligent industrial pH sensor designed for continuous measurement and control of water quality. It features enhanced stability with internal axial capacitor filtering and 100MΩ impedance, four-layer isolation for interference resistance, and IP68 waterproof rating.

### Key Features

- pH range: 0 to 14.00
- Accuracy: ±0.02 pH
- IP68 waterproof
- 100MΩ high impedance
- Four-layer isolation
- RS485 or analog output
- 3-point calibration
- 3/4" NPT mounting

### Applications

- Agricultural irrigation
- Greenhouses and hydroponics
- Sewage treatment
- Chemical industry
- Environmental monitoring

## 2. Specifications

| Parameter | Specification |
|:----------|:--------------|
| **Measurement Range** | 0 to 14.00 pH |
| **Resolution** | 0.01 pH |
| **Accuracy** | ±0.02 pH |
| **Stability** | ≤0.02 pH / 24 hours |
| **Power Consumption** | ≤0.5W |
| **Protection Rating** | IP68 |
| **Operating Temp** | 0 to 70°C |
| **Operating Humidity** | ≤85% RH |
| **Working Pressure** | 1.0 MPa |
| **Housing Material** | PTFE |
| **Start-up Time** | 95% of reading within 10 s, 100% within 15 s |
| **Update Rate** | New reading every 0.5 s |

## 3. Physical Dimensions

| Parameter | Dimension |
|:----------|:----------|
| **Total Length** | 175 mm |
| **Probe Diameter** | 28 mm |
| **Mounting Thread** | 3/4" NPT, top and bottom |
| **Cable** | Direct cable, 5 m standard, custom length to order |
| **Probe Head** | 65 mm |
| **Body** | 90 mm |
| **Tail** | 20 mm |

## 4. Electrical Characteristics

Each probe is built with one output type, selected when it is ordered.

| Output Type | Supply Voltage |
|:------------|:---------------|
| 0 to 2V DC | 12-24 VDC |
| 0 to 5V / 0 to 10V DC | 12-24 VDC |
| 4 to 20mA | 12-24 VDC |
| RS485 | 12-24 VDC |

## 5. Wiring

### RS485 Interface

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

### Analog Interface

| Wire Color | Function |
|:-----------|:---------|
| **Red** | Power + |
| **Black** | Power - |
| **Green** | Signal + |
| **Yellow** | Signal - |

## 6. Communication Settings (RS485)

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

## 7. Register Map

### Measurement Registers (Function 0x03)

| Address | Description | Scaling |
|:--------|:------------|:--------|
| 0x0000 | pH Value | Value ÷ 100 |

### Configuration Registers (Function 0x06)

| Address | Description | Notes |
|:--------|:------------|:------|
| 0x0009 | Intercept/Offset | Value ÷ 100 |
| 0x0050 | Slave Address | 0x01 to 0xFE |
| 0x005A | 9.18 pH Cal | Write 0x000A |
| 0x005B | 6.86 pH Cal | Write 0x000B |
| 0x005C | 4.00 pH Cal | Write 0x000C |

## 8. Reading pH Value

```
Request:  01 03 00 00 00 01 84 0A
Response: 01 03 02 02 AE 38 98
```

**Decoding:** 0x02AE = 686 → 686 ÷ 100 = **6.86 pH**

## 9. Three-Point Calibration

| Solution | Register | Command |
|:---------|:---------|:--------|
| 9.18 pH | 0x005A | `01 06 00 5A 00 0A 29 DE` |
| 6.86 pH | 0x005B | `01 06 00 5B 00 0B B9 DE` |
| 4.00 pH | 0x005C | `01 06 00 5C 00 0C 49 DD` |

## 10. Analog Output Conversion

### Voltage to pH

| Output | Formula |
|:-------|:--------|
| 0 to 2V DC | pH = V × 7 |
| 0 to 5V DC | pH = V × 2.8 |
| 0 to 10V DC | pH = V × 1.4 |

### Current to pH

| Output | Formula |
|:-------|:--------|
| 4 to 20mA | pH = (A - 4) × 0.875 |

## 11. Installation Notes

**Safety**

- Do not hot-plug
- Verify connections first
- Use 3/4" NPT fittings

**Sensor Care**

- Rinse with distilled water
- Avoid air bubbles
- No sharp objects

## Ordering Information

| Part number | Description |
|:------------|:------------|
| AGRINOVO-PH-110 | Industrial pH Sensor |

## Revision History

| Rev | Date | Changes |
|:----|:-----|:--------|
| 1.0 | June 2026 | Initial release |
| 1.1 | August 2026 | Layout revision |
| 1.2 | October 2026 | New layout; output options, pressure, housing material, cable and start-up time added |

## Contact

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