What is the measuring range of the CO2 sensor?

The measuring range is 0-2000ppm or 0-5000ppm for carbon dioxide concentration.

What output signals are supported?

The device supports RS485 (Modbus protocol), 4-20mA, 0-5VDC, and 0-10VDC output signals.

Is the product customizable?

No, this specific model is non-customized. However, we offer OEM services for branding.

Firstrate FST100-2004 Cheap RS485 4-20ma CO2 Transmitter Cheap CO2 Sensor Indoor

Name: Firstrate FST100-2004 Cheap RS485 4-20ma CO2 Transmitter Cheap CO2 Sensor Indoor
Brand: Hunan Firstrate Sensor Co., Ltd.
SKU: 2192963015

Hunan, ChinaHunan Firstrate Sensor Co., Ltd.

US$78.00

5-99 Pieces

US$58.00

100+ Pieces

Product profile

Customization

Available

After-sales Service

1 Year

Warranty

1 Year

Model NO.

FST100-2004

Brand

Firstrate

Customized

Non-Customized

Portable

Non Portable

Certification

RoHS

Gas

CO2

Type

Electrochemical Gas Analyzer

Testing Range

Carbon dioxide concentration 0-5000ppm

Working Voltage

24V DC or low Voltage(1.2W 0.4W)

Output signal

4~20mA 0~5VDC 0~10VDC RS485 output (Modbus protoco

Voltage

10-30VDC Note: 0-10VDC output (limited to 24VDC po

Power consumption

Low voltage consumption for optional

Accuracy

CO2 concentration ±40ppm +3%FS (25°C)

Electrical connections

Direct Lead

Long term stability

≤30 ppm / year

Product name

Cheap RS485 4-20mA Carbon Dioxide Meter Co2 Sensor

Specification

Stainless Steel

Trademark

Firstrate

Origin

Changsha China

Key features

Multiple Output Signals: Supports RS485 (Modbus), 4-20mA, 0-5VDC, and 0-10VDC outputs.

Wide Application Range: Ideal for indoor air quality, greenhouses, offices, and commercial buildings.

Easy Installation: Features a wall-mounted housing design for simple and quick setup.

RoHS Certified: Product meets RoHS certification standards for safety and compliance.

Customizable Address: Device address 1-255 is adjustable, default is 1 for flexible networking.

Low Power Consumption: Optimized for low voltage consumption, max 1.2W for analog signals.

Company profile

Self-brandedLow MOQOEM ServicesQuality Assurance

Hunan Firstrate Sensor Co., Ltd.

Hunan, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 9 Years CertifiedNearest Port: Guangzhou Port, Shenzhen Port, Changsha Port, Shanghai PortAverage Response Time: ≤1.52h

AI-Powered supplier vetting

SummaryThe supplier is a professional technical supplier focused on general instruments, intelligent equipment, industrial automation, IoT, software development, and related technology services. It offers 3D design, SDK, OEM, ODM, and broad customization services. Quality and service processes are documented and followed, including complaint handling, corrective actions, finished-product inspection, and supplier assessment. The supplier holds ISO9001:2015, CE, and RoHS certifications. However, the available information identifies no valid manufacturing contract with factories or related subcontractors, no inventory, overseas warehouse, or overseas showroom capability, and no new product development during the past year. Financial records are referenced for prior years, but the provided slices do not establish financial strength or credibility. Export experience is stated as nine years, with exports representing 11%–20% of total sales.

Supplier typeThe supplier is explicitly identified as a professional technical supplier. Its stated scope covers general instruments, intelligent equipment, industrial automation, IoT research and development, software development, technology services, and import-export activities, indicating a technology-oriented manufacturer and service provider.

CertificationsThe supplier is reported to hold an ISO9001:2015 certificate and product-related CE and RoHS certification capabilities. These certifications provide explicit evidence of quality-management and product-compliance credentials.

After-Sales capabilityThe supplier has documented and followed procedures for corrective and preventive actions and customer complaint handling. It also has written procedures and records for assessing service capability, but the slices do not describe actual response outcomes or service performance after delivery.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, minor customization, and flexible customization. Its R&D, software, ODM, and intelligent-equipment scope further supports the availability of tailored technical solutions.