12 years instrument development manufacturer.

  • Product Details

ONETEST-500XP-3 negative oxygen ion on-line monitoring system is a system and equipment for measuring the real-time concentration and changes of negative oxygen ions, temperature, humidity, PM2.5, PM10, carbon monoxide, sulfur dioxide, nitrogen dioxide, ozone, wind speed, wind direction, atmospheric pressure, ultraviolet rays, total radiation and other indicators in the ambient air. It adopts the measurement principle of "cylindrical capacitive inhalation method". In order to meet the business needs of environmental meteorological observation, a built-in dehumidification device is specially designed, which has strong environmental adaptability. The standard measurement parameters are: negative ions, temperature, humidity, PM2.5,PM10 and other indicators can be increased to meet the requirements of high precision and stability of observation data. It has the characteristics of high reliability, high accuracy, easy maintenance and easy data backup, and is mainly aimed at parks, scenic spots, nature reserves, wetlands, schools, hotels and squares all over China.

Overall dimensions:

Length 28.5 (including protrusion), width 10 and height 11.5(cm)


About 2.5K

Detecting ions:

Positive ions, negative ions, temperature, humidity, PM2.5,PM10 (other monitoring indicators can be discussed with our company).

Measuring principle:

Cylindrical capacitive inhalation method


Measurement range:






0-2 million PCs /cm3





Resolution: 1 /cm3

     Accuracy: 0.5.

   Accuracy: 3% RH

Sensitivity is 0.1ug/m3.

 Sensitivity is 0.1ug/m3.

Range gear:

Three gears within the range of 0-2 million /cm3 can be selected.

Migration rate:

0.4 or 0.7cm2/V.Sec is optional.

Data output:

Support GPRS, RS485, RS232, wifi, Zegbe and other transmission functions are optional.

Sampling time:

30 times/second

Measurement display time:

3 times/second

Determination accuracy:

Better than 10%

Sampling flow rate:

1.3 m /sec


Measurement mode:

Real-time measurement mode (display updates 3 times/second)

On-line measurement mode (data upload once per 10 minutes)

Automatic measurement mode: positive ions and negative ions are measured alternately in a set time. Manual measurement mode: positive ions or negative ions are selected for measurement.

Zero adjustment:

Automatic zero mode or manual zero mode (with automatic zero calibration system)

Fan specifications:

Adopt a 4010-size fan,

Life span is more than 50,000 hours.


Wind speed 1.3m/s



The device is equipped with an independent 7-inch touch LCD screen, which supports multi-channel and multi-parameter input and has a memory of 30m.

Calibration function:

The instrument can be calibrated by software or remotely.





Cloud platform data management:

1. The necessary parameters of the embedded software can be set and modified through the computer terminal, such as the geographical location, altitude, time, sampling frequency and other parameters of the monitoring station.

2. When the equipment is automatically protected in case of abnormality, it can give alarm messages, emails, WeChat and other information.

3. It has the function of parameter setting, supports remote configuration, and has the function of running state monitoring and alarm.

4, with the original observation data, quality control data, analysis and processing data warehousing, query, retrieval and other functions.

5. It has the function of generating real-time transmission files according to the specified data format and file naming rules.

6. Support computer/mobile phone /iPad and other devices to view data, draw curves, store data, download and map devices.

7, can be set online measurement interval mode

Working environment:

Temperature:-20 ~ 60℃ Humidity: 0-95%RH (no condensation)





DC12V@2A power supply,

Acceptable solar power supply, working current less than 350mA, standby current less than 250mA, and power consumption less than 40W.

Louver box:

Waterproof, radiation-proof, high temperature-resistant, anti-aging, fixed height 2 meters, U-shaped fixed thickness 1 mm.

Lightning protection system:

With lightning protection module

Timing start:

Low energy consumption can be customized to set the switching time.

Dehumidification system:

The equipment starts the dehumidification system at the specified humidity to ensure the equipment operation.

Refrigeration system:

The equipment starts the cooling system at the specified temperature to ensure the equipment operation and selection.

Display support:

Support mobile phones, computers, tablets, multimedia display machines, networked TVs, outdoor LED screens, etc.

Specification for outdoorLED display screen


Default full-color P3 1.35X0.87m (single color screen and double color screen can be customized).

Install the column:

Double column height 1.5mm thickness 1mm 4 empty fixed (or custom landscape support)

Power supply:

220V mains or solar energy.

Construction drawing:


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