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Oxygen Gas Sensor/Transmitter, RS485/4-20mA/0-5V

5 out of 5 based on 2 reviews | Write a review

$101.58

The oxygen gas sensor measures ranges of 0-30%VOL for RS485 output and 0-25%VOL for analog output, with an accuracy of ±3%FS and a resolution of 0.1%VOL. Gas transmitter has a power supply range of 10~30V DC, with the 0~10V output type requiring a 24V supply. Widely used in industries such as process control, environmental monitoring, medical devices, food and beverage, safety detection, scientific research, and combustion system optimization.

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Epitaxial Probe

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SKU: ATO-GS-O2-3002

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Overview
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The oxygen gas sensor measures 0-30%VOL (RS485) and 0-25%VOL (analog) with ±3%FS accuracy and 0.1%VOL resolution. It operates on 10~30V DC, requiring 24V for 0~10V output, and is widely used in process control, environmental monitoring, healthcare, and safety applications.

Specification

Model	ATO-VMS-3002-O2-*
Power Supply	10~30V DC (0~10V output type requires 24V supply)
Output Signal	4-20mA, 0-5V, 0-10V (optional)
Power Consumption	RS485: 0.12W; 4-20mA, 0-5V, 0-10V: 0.25W
Operating Temperature	-20~50°C
Operating Humidity	5~95%RH, non-condensing
Pressure Range	90~110kPa
Stability	≤5% signal value/year
Response Time	≤10s
Preheating Time	≥5 minutes
Zero Drift (-20~40°C)	±0.3%VOL
Repeatability	≤1%
Service Life	≥24 months
Measurement Range	RS485: 030%VOL; Analog: 025%VOL
Accuracy	±3%FS
Resolution	0.1%VOL

Feature

High Protection and Durable Exterior: Made with high-density materials and equipped with waterproof seals to provide moisture and dust resistance, ensuring reliable operation in harsh environments.
Standard ModBus-RTU Communication Protocol: Supports RS485 communication interface with configurable communication addresses and baud rates. It offers a maximum communication distance of up to 2000 meters, ideal for remote monitoring applications.
High Efficiency and Sensitivity: Equipped with a highly sensitive gas detection sensor that delivers stable signals and high precision, ensuring real-time and accurate oxygen monitoring.
Wide Application Environments: Suitable for use in factories, warehouses, food storage facilities, farms, orchards, and forestry applications, meeting both industrial and agricultural oxygen detection needs.

Size (Unit:mm)

O2 transmitter size

Wiring Instructions

RS485

Wide voltage power supply input 10~30V is available. 485 signal line wiring, pay attention to the A\B two lines can not be reversed, the address of multiple devices on the bus can not conflict.

O2 transmitter wiring diagram

	Wire Color	Description
Power	Brown	Power Positive
Power	Black	Power Negative
Communication	Yellow	RS485-A
Communication	Blue	RS485-B

4-20mA/0-5V

Wide voltage 10~30V DC power input. For 0-10V output type devices only 24V power supply can be used.

	Wire Color	Description
Power	Brown	Power Positive
Power	Black	Power Negative
Output Signal	Yellow	Signal Positive
Output Signal	Blue	Signal Negative

Application

O2 transmitter application

Tips: What kind of maintenance does the sensor require?

To ensure long-term performance and accuracy, the sensor requires minimal but regular maintenance, which includes:

Periodic calibration: Calibration every 6-12 months to correct signal drift and maintain accuracy.
Cleaning: Gently clean the exterior to remove dust, moisture, or contaminants. Ensure the waterproof and dustproof seals remain intact.
Inspection: Regularly check for signs of wear, damage, or unusual readings. Address issues promptly to avoid sensor failure.
System check: For RS485 communication, confirm that the wiring, connections, and data transmission remain stable over time.

Oxygen Transmitter (Analog Type) User Manual. PDF

Existing reviews of Oxygen Gas Sensor/Transmitter, RS485/4-20mA/0-5V

Application in oxygen detection

Hello, I am interested in the device with product number ATO-GS-O2-3002. We plan to use it in a copper leaching process, requiring hourly oxygen concentration measurements. We have designed a system where gas samples are collected through a T-connector, and the gas flows upwards driven by a pump. Is this sensor suitable for this application? We are concerned that the pump might interfere with gas sampling or affect the sensor's measurement accuracy.

From: Zinia | Date: 16/12/2025

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ATO Responded

Sorry, we haven't tested it and are unsure if it's suitable for your application. You can purchase one to test.

0-5V Sensor

Unfortunately, we're looking for a sensor with a 0-5V output, but the SKU: GD300-O2 doesn't seem to have this option. For the SKU: ATO-OS-3002O2, what's the temperature of the heating element? Will the sensor still output readings during the 5-minute warm-up period?

From: Enres | Date: 04/09/2025

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ATO Responded

This sensor (SKU: ATO-OS-3002O2) will only output accurate data after the 5-minute warm-up period. While it will output data during the 5-minute warm-up period, the values may be inaccurate.

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