CAAQMSOEM: Oizom

Polludrone

A continuous ambient air quality monitoring station of the class GOCEMS monitors — up to 9 gases plus particulates, noise and weather in one solar-powered, IP66 unit, reporting 24/7.

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Up to 9 gases + PM
Solar / IP66
EPA-grade calibration

Polludrone continuous ambient air quality monitoring station, pole-mounted (manufactured by Oizom)

Why it matters for monitoring

Built for unattended field operation

Sampling, power, connectivity and storage are all designed so a unit can sit on a fenceline for years and keep delivering data GOCEMS can trust.

Patented e-breathing

Micro active sampling isolates the air sample for higher accuracy in the field.

On-device calibration

Built-in calibration software; cloud calibration over the standby GSM link.

Weather resistant (IP66)

Certified enclosure rated for harsh, high-humidity and dusty conditions.

Solar powered

Runs 100% on solar for off-grid sites; LiFePO4 battery gives up to 24 h backup.

Over-the-air updates

Firmware and configuration pushed from the server — no site visit required.

Network agnostic

GSM / LTE / Wi-Fi / LoRa / NB-IoT / Satellite / Ethernet / Modbus.

Retrofit design

Compact pole- or wall-mount unit that drops into existing infrastructure.

Onboard buffering

Up to 16 GB / 90 days of local storage so no data is lost if the link drops.

Configurations

Four variants, one platform

Polludrone Lite

General purpose, smart campus

PM1, PM2.5, PM10, PM100, CO₂, CO, Noise, Light, UV, Temp, Humidity, Pressure

Polludrone Smart

Extensive, smart cities

Lite set + SO₂, NO, NO₂, O₃

Polludrone Pro

Critical, industrial fenceline

Smart set + H₂S, TSP (PM100)

Polludrone Custom

As per project brief

Up to 9 gases + PM + T/H/P + noise, with optional wind, rain & vibration modules

What it measures

Sensor parameters & ranges

Parameter	Range	Resolution	Principle
PM1 / PM2.5 / PM10 / TSP	up to 5000 µg/m³	0.1 µg/m³	Laser scattering
Carbon monoxide (CO)	0–5 / 0–50 / 0–100 ppm	0.01 ppm	Electrochemical
Carbon dioxide (CO₂)	0–1000 / 0–5000 ppm	0.75 ppm	NDIR
Nitric oxide (NO)	0–5 / 0–100 ppm	0.001 ppm	Electrochemical
Nitrogen dioxide (NO₂)	0–10 / 0–100 ppm	0.001 ppm	Electrochemical
Ozone (O₃)	0–10 ppm	0.001 ppm	Electrochemical
Hydrogen sulphide (H₂S)	0–1.5 / 0–50 / 0–200 ppm	0.001 ppm	Electrochemical
Sulphur dioxide (SO₂)	0–10 / 0–100 ppm	0.001 ppm	Electrochemical
Ambient noise	up to 140 dB	1 dB	Acoustic
Temp / Humidity / Pressure	−40 to 125 °C · 0–100 %RH · 300–1100 hPa	0.01 °C	Capacitive / resistive
Solar radiation & UV	up to 100,000 lux · UV index 0–12	0.1 lux	Photoconductivity

External modules available: wind (anemometer), rain gauge and vibration sensors. Ranges vary by sensor option — figures are indicative, per the Polludrone datasheet V7.1, and are confirmed for each deployment.

Specifications

Hardware at a glance

Mechanical

Dimensions: 360 (H) × 328 (W) × 200 (D) mm
Weight: 8 kg
Enclosure: Al-Mg alloy / powder-coated mild steel / FRP
Certifications: CE, FCC, NEMA 4X, IP66, RoHS, PTCRB

Power

Consumption: Up to 7 W (varies with parameter count)
Input: 110–240 V AC 50/60 Hz, or 24 V DC
Solar: 100 W / 24 V panel
Battery: LiFePO4 12.8 V — up to 24 h backup

Compute & data

Processor: Quad-core ARM Cortex, 2 GB RAM / 16 GB eMMC
Onboard storage: Up to 16 GB / 90 days
Data interval: 5–30 min (configurable)
Transport: HTTPS push to host; OTA firmware; API access

Connectivity

Cellular: GSM 2G/3G/4G, LTE CAT-M1 / NB1
Wireless: Wi-Fi, LoRa, NB-IoT, Satellite
Wired: Ethernet (static / DHCP), Modbus RS485 RTU/TCP
I/O: 2-channel relay output

Typically pole / wall mounted, 4–5 m height, 270° open surrounding AC/DC or solar power within 2 m of the unit Active sampling ~325 mL/sample · <48 h to stabilise

Data quality

Three-step calibration

Laboratory calibration

Every unit is calibrated in an ISO/IEC 17025:2017 lab against NIST-traceable reference gases, following U.S. EPA guidelines.

Collocation calibration

Units are then run beside a reference station using U.S. EPA-designated FEM/FRM instruments to tune real-world response.

On-site calibration

Once running in the field, units are calibrated on location with known-concentration cal gas or by collocating with a reference standard.

How Polludrone fits GOCEMS

Stations like Polludrone stream into the GOCEMS cloud, where ECHT's monitoring service takes over — data validation, EPA-Ghana compliance dashboards, threshold alerts and one-click regulatory reports all run on top of that feed.

Talk to our team Back to GOCEMS

Polludrone is designed and manufactured by Oizom Instruments Pvt. Ltd. This page is a technical reference for the instrumentation GOCEMS monitors — ECHT Environmental Services operates the monitoring, validation and compliance service and does not sell or install monitoring hardware. Specifications are drawn from the Polludrone datasheet (V7.1) and are subject to change by the manufacturer.