Stable Water Quality Sensor ORP Digital Sensor Replacement
High-precision ORP sensor with 1mV resolution and accurate ±6mV
measurement for reliable water quality monitoring.
Product Overview
Aquaculture Industry Water Quality Sensor ORP Sensor with RS485
Output and no display. Durable ORP electrode designed for
industrial applications.
Applications
KWS-550 is suitable for environmental water quality monitoring,
acid/alkali/salt solutions, chemical reaction processes, and
industrial production. Meets online ORP measurement requirements
for most industrial applications.
Key Features
- Signal output: RS-485 (Modbus/RTU protocol)
- Compatible with third-party equipment including PLC, DCS,
industrial control computers, general controllers, paperless
recording instruments, and touch screens
- Double high impedance differential amplifier for strong
anti-interference and fast response
- Durable ORP electrode with internal reference fluid that seeps
slowly under pressure, providing stable reference system lasting
over 20 months
- Easy installation with 3/4NPT pipe thread for sinking installation
or mounting in pipelines and tanks
- IP68 protection level for reliable operation in demanding
environments
Technical Specifications
| Model | KWS-550 |
|---|
| Measuring Range | -1500~+1500mV |
|---|
| Accuracy | ±6mV |
|---|
| Resolution | 1mV |
|---|
| Temperature Range | 0 ~ 65℃ |
|---|
| Work Pressure | <0.1MPa |
|---|
| Output | RS-485, MODBUS protocol |
|---|
| Power Supply | 12~24VDC ±10% |
|---|
| Wetted Part Material | POM |
|---|
| Installation | Immersion mounting, 3/4 NPT thread |
|---|
| Cable Length | 5 m, customizable |
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| Calibration Method | One-point calibration |
|---|
| Power Consumption | <0.3W@12V |
|---|
| IP Grade | IP68 |
|---|
Product Dimensions

Company Introduction
Xi'an Kacise is certified by ISO 9001-2008, GJB 9001B-2009, CE,
intrinsic safety explosion-proof and isolated safety
explosion-proof, ensuring our products conform to international
standards.
With over 10 years of specialization in manufacturing pressure,
level and flow measuring instruments, we have experienced technical
and management personnel. Through continuous improvement efforts,
we have become a professional measuring instrument manufacturer and
solution provider.
Kacise sensors are exported to America, Spain, Australia, Chile and
20 other countries and regions, receiving favorable feedback. We
operate on the principles of reasonable prices, efficient
production time and good after-sales service, seeking cooperation
with customers for mutual development.
Frequently Asked Questions
What information need to be provided to choose the suitable model?
Application field, measuring range, accuracy, and other related
parameters.
Are you a trade company or a manufacturer?
We are an ISO approved manufacturer specialized in level and flow
measuring instruments. OEM & ODM services are available.
What is your MOQ?
To start our cooperation, sample order is acceptable.
What is your delivery date?
The delivery date is about 3-15 working days after receipt of
payment.
What is your payment terms?
We support T/T, PayPal. For mass production orders, 30% deposit in
advance and 70% balance before shipment.
What is Trade Assurance payment method?
It's a free service which can protect your orders from payment to
delivery. We have USD104,000.00 of caution money to assure your
orders.
Do you have a warranty?
Yes, we have the warranty of 12 months.
