Sensor Tube DF4/DF5

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Sensor Tube DF4/DF5

The Sensor Tube DF-4/DF-5 is designed for air monitoring applications in locations without a power supply, allowing for extended monitoring periods without interruption. It supports up to four gas modules, which can be configured at the time of purchase, including ozone (O₃), nitrogen dioxide (NO₂), nitrogen monoxide (NO), carbon monoxide (CO), carbon dioxide (CO₂), sulfur dioxide (SO₂), and hydrogen sulphide (H₂S). The PM module, available only for the DF-5, enables simultaneous measurements across multiple PM size channels for accurate PM (PM₁, PM₂.₅ and PM₁₀) monitoring.

Ultra-compact design with maintenance-free operation, weatherproof package powered by long-duration internal battery.

PCT patented Pair Differential Filter (PDF) technology for gas sensors to auto track the virtual baseline of sensor signals to offer unmatched performance at ppb level measurements

At least two gas modules capable of measuring nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), and carbon monoxide (CO) etc, all together simultaneously using respective electrochemical sensors equipped.

Product Detail

Low cost and compact: The Sensor Tube DF Series

Engineered for critical off-grid monitoring, the DF-4/DF-5 series combines a space-optimized housing with industrial-grade capabilities. Its compact form enables rapid lamp-post deployment while housing large-capacity batteries for season-long operation. Modular gas configurations (plus PM on DF-5) deliver multi-pollutant intelligence from a single node. This transforms constrained locations into strategic data assets – scaling from block-level insights to city-wide air quality networks.

Certification

As an ISO 9001 and ISO 14001 certified company, we are committed to technological excellence and sustainability.

NO₂ NO CO O₃ SO₂ CO₂ H₂S PM₁ PM_2.5 PM₁₀ Relative Humidity Temperature Pressure Wind Direction Wind Speed

Features and advantages

Waterproof Design

Waterproof design, suitable for various outdoor environments, modular for easy maintenance.

Dynamic Baseline

Proprietary technology, real-time baseline tracking, eliminates temperature and humidity effects.

Humidity Correction

Built-in high-performance sensors ensure accurate particle concentration measurements.

Solar Power Supply

Optional solar panel, ideal for remote outdoor environments.

Data Transmission

4G network data transmission, cloud platform supports real-time monitoring and remote calibration.

Cloud Analysis

Cloud storage and intelligent platform for easy access and in-depth data analysis.

Remote calibration

The Sapiens SEIN platform offers a calibration function, which is a powerful and unique tool for quality control and assurance

Extended Battery Life

External battery pack extends outdoor operation time up to 1 month

Specifications

Dimension

250 mm (H) *155 mm (D) in cylindric shape.

Weight

<5 kg

Environmental Operating Range

Temperature: -10-45°C; Humidity: 5-99 %; Pressure: 80kPa~120kPa

Power Input

Internal Battery for minimum of 7 days continuous operation with extended battery capacity.
Optional: External solar panel for continuous operation; mains supply for continuous operation

Power Consumption

Normal @ 0.2 W, Max @ 0.6 W

Data Management

Sapiens Environment IoT Network (SEIN) network for remote data browsing, downloading, system condition checking and control, and data management

Data Communication

4G module communication for data transmission to cloud platform; RS485communication for Sapiens Console software with data streaming and system configuration

Data Storage

16G On-board Flash for data storage

Gas sampling

Diffusion based sampling

PM Sampling (DF5 Only)

Fan based sampling

Sampling Rate

1 minute

Averaging Interval

1 minute, 1 hour, 1 day

Quality Control System

Pair Differential Filter technology for temperature and humidity impact correction on gas sensor signals;

Installation Options

Tripod/ Wall mount/ Cross arm

Download Spec Sheet

Connectivity

Seamless IoT Integration

Our solutions enable effortless connectivity across diverse devices and platforms, unifying sensors, systems, and applications into a cohesive smart ecosystem SEIN platform. With cross-protocol compatibility and real-time data synchronization, we empower businesses to streamline operations, enhance decision-making, and scale innovations securely—all through a single, intuitive interface.

Power Packs

The DF-4/DF-5 have different power options, as per follows:

Solar Panel
Mains Supply
External Smart Battery

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