Product Overview
The SUP-ADP2400 is a digital pH sensor developed for continuous pH monitoring in aquaculture and other compatible aqueous solution measurement environments. Unlike conventional analog electrodes that require a dedicated analog transmitter interface, the ADP2400 incorporates an RS485 digital communication interface for direct integration with industrial monitoring systems.
Key Features
Compact Digital Sensor Design
Isolated Power Supply for Stable Data Transmission
RS485 Modbus RTU Communication
Automatic & Manual Temperature Compensation
Flexible pH Calibration
Remote Configuration via Communication Protocol
Measurement Principle
The ADP2400 measures pH using an electrochemical glass electrode principle. When the sensor is immersed in an aqueous solution, hydrogen ions selectively accumulate on the outer surface of the sensing membrane and generate an electrochemical potential difference.
An integrated Ag/AgCl reference system provides the reference potential. According to the Nernst equation, the potential difference between the measuring electrode and the reference electrode is converted into the corresponding pH value.
Technical Specifications
| Parameter |
Specification |
| Product |
Digital pH Sensor |
| Model |
SUP-ADP2400 |
| Measured Variables |
pH; Temperature (optional) |
| pH Range |
0.00-14.00 pH |
| Temperature Range |
0-60 °C, optional |
| pH Accuracy |
0.02 pH |
| Temperature Accuracy |
0.5 °C |
| pH Resolution |
0.01 pH |
| Temperature Resolution |
0.1 °C |
| Temperature Compensation |
NTC10K or NTC22K, optional |
| Temperature Compensation Mode |
Automatic / Manual |
| Communication |
RS485 |
| Protocol |
Modbus RTU |
| Power Supply |
6-30 VDC |
| Typical Power Consumption |
12 VDC @ 10 mA |
| Medium Temperature |
0-50 °C |
| Pressure Resistance |
1.0 MPa |
| Ambient Temperature |
0-50 °C |
| Storage Temperature |
0-50 °C |
| Housing Material |
304 Stainless Steel |
| Weight |
210 g, excluding leads |
Frequently Asked Questions
Q: What does the SUP-ADP2400 measure?
The ADP2400 measures pH from 0.00 to 14.00 pH. Optional temperature measurement from 0 to 60 °C is also available.
Q: What applications is the ADP2400 designed for?
The product manual specifically identifies aquaculture as the primary application and specifies pH measurement in aqueous solutions.
Q: Does the ADP2400 support Modbus RTU?
Yes. The sensor uses an RS485 interface and supports Modbus RTU communication.
Q: Can it communicate directly with a PLC or SCADA system?
Yes. According to the manual, the RS485 Modbus RTU interface supports remote communication with host systems including PLCs, industrial PCs and SCADA systems.
Q: What power supply does the ADP2400 require?
The specified power supply range is 6-30 VDC. Typical power consumption is listed as 12 VDC at 10 mA.
Q: Does the ADP2400 provide temperature compensation?
Yes. Automatic and manual temperature compensation are supported. Optional NTC10K or NTC22K temperature elements are specified in the manual.
Q: What pH buffer solutions can be used for calibration?
The sensor supports standard buffer sets including pH 4.01 / 7.00 / 10.01 and pH 4.00 / 6.86 / 9.18, as well as user-defined calibration solutions.
