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Specification
| Product | Digital pH sensor |
| Model | SUP-PH8001 |
| Measurement range | 0.00-14.00pH; ±1000.0mV |
| Resolution | 0.01 pH, 0.1 mV |
| Heat resistance | 0-60℃ |
| Accuracy | 0.02 pH 0.5℃ 0.2 mA |
| Output | RS485 (MODBUS-RTU) |
| ID | 9600, 8, 1,N (Standard) 1-255 |
| Power supply | 6~30VDC |
| Power consumption | 30 mA @12VDC |
Communication Protocol
Communication interface: RS485
Port setting: 9600,N,8,1 (default)
Device address: 0x01 (default)
Protocol specification: Modbus RTU
Instruction support: 0x03 read into register
0x06 write register | 0x10 write register continuously
Register data format
| Address | Data name | Conversion factor | Status |
| 0 | Temperature | [0.1℃] | R |
| 1 | PH | [0.01pH] | R |
| 2 | PH.mV | [0.1mV] | R |
| 3 | PH. Zero | [0.1mV] | R |
| 4 | PH. slope | [0.1%S] | R |
| 5 | PH. Calibration points | - | R |
| 6 | System status. 01 | 4*bits 0xFFFF | R |
| 7 | System status. 02 | 4* bits 0xFFFF | R/W |
| 8 | User command address | - | R |
| 9 | User commands. Results | [0.1mV] | R |
| 11 | ORP | [0.1mV] | R |
