SenseCAP pH Probe S-pH-01A V2 — RS485 / 0–2V
SenseCAP pH Probe S-pH-01A V2 — RS485 / 0–2V is an IoT Sensor. Connectivity includes RS485, Modbus RTU, Analog. Suitable for Environmental measurements and monitoring in Outdoor deployments. IP68 electrode; IP65 transmitter-rated enclosure protection.
Product Overview
Features
- High Performance: High accuracy, fast response, good repeatability
- Universal Protocol: MODBUS-RTU RS485 and 0~2V Analog Voltage
- Wide-range Power Supply: Can be powered with supply voltage within 3.6V ~ 30V
- Strong Robustness: Suitable to be immersed in soil or water for a long time, anti-corrosion
- Maintainance-Free: A unique junction efficiently improves the problem of junction clogging
This pH Sensor with hook-up wires measures the hydrogen-ion activity in water-based solutions, indicating its acidity or basicity expressed as pH. pH level is an important indicator in many scenarios, especially in monitoring soil conditions and water quality.
This pH Sensor is designed with industry standards. It adopts international advanced solid dielectric and large-area polytetrafluoroethylene liquid junction, which is not easy to block and convenient for maintenance. Its electrode is IP68, the transmitter is IP65 rated, waterproof in a tight seal, and capable of withstanding long-term constant use in professional scenarios. This pH Sensor comes with a MODBUS-RTU RS485 serial communications protocol and 0~2V Analog Voltage output. It can be easily connected and integrated with other devices such as data loggers, Converter, displays, etc. This cost-effective pH sensor features low-power consumption, compact size, portability, and high integration.
also provides the SenseCAP Portal and SenseCAP Mate to help users better manage and check data remotely.

Description
This pH Sensor with hook-up wires measures the hydrogen-ion activity in water-based solutions, indicating its acidity or basicity expressed as pH. pH level is an important indicator in many scenarios, especially in monitoring soil conditions and water quality.
This pH Sensor is designed with industry standards. It adopts international advanced solid dielectric and large-area polytetrafluoroethylene liquid junction, which is not easy to block and convenient for maintenance. Its electrode is IP68, the transmitter is IP65 rated, waterproof in a tight seal, and capable of withstanding long-term constant use in professional scenarios. This pH Sensor comes with a MODBUS-RTU RS485 serial communications protocol and 0~2V Analog Voltage output. It can be easily connected and integrated with other devices such as data loggers, Converter, displays, etc. This cost-effective pH sensor features low-power consumption, compact size, portability, and high integration.
also provides the SenseCAP Portal and SenseCAP Mate to help users better manage and check data remotely.
Specification
| pH | |
|---|---|
| Range | 0 ~ 14pH |
| Accuracy | ± 0.1 pH |
| Resolution | 0.01 pH |
| General Parameters | ||
|---|---|---|
| Product Model | S-pH-01A | |
| Output Interface | Analog Voltage 0-2V (Output resistance ~0ohm) | RS-485 MODBUS-RTU |
| Power Supply | 3.9-30V/DC | 3.9-30V/DC |
| Power Consumption | 35mA@24V DC | 35mA@24V DC |
| Start-up time | < 2 seconds | |
| pH Measurement |
High impedance and isolated input;
Range: 0 – 14PH,
Resolution: 0.01PH,
Accuracy: +/- 0.1PH;
Can be used for a solution or semi-solid substrate
|
|
| Temperature Measurement |
Range: – 40~80°C,
Resolution: 0.1°C,
Accuracy: +/-0.5°C
|
|
| IP Rating |
Electrode: IP68; Transmitter: IP65 |
|
| Operating Temperature | -40℃ ~ 85℃ | |
| Installation |
Electrode: 3/4″NPT screw threads; Transmitter: Mounting hole |
|
| Cable Length |
Power and Signal Cable:2 meters (Customizable)
Electrode Cable: 5 meters
|
|
| Dimension |
Electrode: Width*Diameter 160*30mm; 3/4″NPT screw threads
Transmitter: 140mm*65mm*50mm
|
|
Application
- Agriculture
- Animal Husbandry
- Forestry and Horticulture
- Sewage Treatment
- Swimming Pools and Spas
- Scientific Experiments
- Educational Projects
- Other environmental monitoring scenarios
Wiring Diagram

Probe Dimension

Part List
| Industrial pH Sensor with hook-up wires | 1 |
Policies & Guidelines
Warranty, shipping, and purchasing information
- All prices are stated in US dollars (USD), unless otherwise indicated.
- Full payment must be received and confirmed before an order is prepared or dispatched.
- Payment may be made by bank transfer, Bitcoin, or USDT. The payment methods available for each order are displayed at checkout.
- Shipping charges are shown separately at checkout. The quoted shipping charge includes applicable import duties, taxes, and customs-clearance charges for the delivery destination.
- An electronic invoice is made available in the Customer’s account after payment confirmation. An official sales invoice also accompanies the shipment.
- Orders may be cancelled for a full refund before order preparation begins. Once preparation has begun, cancellation is subject to the order’s processing status.
- A Customer wishing to return a non-defective product must request the return within 30 days of delivery. The product must be returned in good condition with its official sales invoice.
- For a non-defective return, the Customer is responsible for return shipping. The refund covers the product price only; the original shipping charge is not refundable.
- Refunds for returned products are initiated after the returned goods have been received and their condition verified. Approved refunds are initiated within seven business days and returned through the original payment method.
- The refundable amount is based on the USD value paid for the product. Refunds for Bitcoin or USDT payments are calculated against that USD amount, rather than a fixed quantity of cryptocurrency. The time required for funds to reach the Customer depends on the payment method and processing provider.
- All devices, sensors, and accessories purchased directly from SenseCAP are covered by a one-year warranty from the date of delivery.
- Warranty eligibility is verified against the original sales record and, where available, the product serial number. For products without a serial number, the order details and official sales invoice are used to identify the purchase.
- The warranty covers manufacturing defects and internal hardware failures arising under normal use and within the product’s specified operating conditions.
- Products that arrive damaged or non-operational should be reported to SenseCAP so that the appropriate shipping or warranty procedure can be arranged.
- Warranty claims are assessed through technical review. Depending on the findings, the resolution may include remote assistance, replacement parts, repair, or an equivalent replacement.
- Customers must obtain return authorization and shipping instructions before sending a product for warranty service.
- For an authorized warranty return, the Customer pays the cost of shipping the product to the designated service location. SenseCAP pays standard shipping for the repaired or replacement product back to the Customer.
- Warranty service addresses the supplied hardware. Network availability, connectivity, subscription services, and any network-based rewards depend on their respective operating requirements and are not guaranteed by the hardware warranty.
- Orders are shipped on a Delivered Duty Paid (DDP) basis to all available delivery destinations.
- The shipping charge displayed at checkout includes transportation, applicable import duties, taxes, and customs clearance. These import charges are not payable separately by the recipient.
- Products with a stated dispatch date are scheduled according to the date shown on the product page. Where no dispatch date is stated, the product is ready for dispatch and is handed over to the carrier within two business days after payment confirmation.
- Dispatch dates refer to handover to the carrier, not delivery to the Customer. Transit time depends on the destination and carrier service.
- Each shipment is accompanied by an official sales invoice and declared using an accurate product description, invoice value, and applicable customs classification.
- Tracking information is provided after the shipment has been handed over to the carrier.
- Customers are responsible for providing an accurate delivery address and any recipient information required to complete delivery and customs formalities.
- Shipping damage should be reported promptly. Customers should retain the product, original packaging, shipping labels, and invoice while the claim is assessed.
- If a shipment is lost or damaged, SenseCAP will review the case with the carrier and advise the Customer of the applicable resolution. Where the issue results from a packing or documentation error attributable to SenseCAP, the resolution may include repair, replacement, or refund.
Policy & Support Pages
Open the complete service, delivery, and support pages