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Seven In One Gas Detection

The main control adopts imported MCU, and the sensor adopts domestic leading brand, which is stable and reliable.
High sensitivity, high resolution, high stability and long service life.
Wired RS485 is compatible with wireless LoRa, and with the gateway, data can be uploaded to the platform.
The unique internal design adds a separate intake fan to speed up air circulation, with timely response and accurate data.
Made of high-quality ABS flame retardant material, with its own design and mold opening, the appearance is exquisite.
The top status light, the working status is clear at a glance.

产品描述
Product Description
Roduct Parameters
Specifications
Instructions For Use

The main control adopts imported MCU, and the sensor adopts domestic leading brand, which is stable and reliable.
High sensitivity, high resolution, high stability and long service life.
Wired RS485 is compatible with wireless LoRa, and with the gateway, data can be uploaded to the platform.
The unique internal design adds a separate intake fan to speed up air circulation, with timely response and accurate data.
Made of high-quality ABS flame retardant material, with its own design and mold opening, the appearance is exquisite.
The top status light, the working status is clear at a glance.

Interface And Hardware Description

(1) Sensitivity - three gears, reserved.

(2) Power interface - VCC: DC12V positive; GND: power ground

(3) RS485 interface - A+: RS485 positive; B-: RS485 negative.

(4) RS485 address - 8-bit address code, the default is 0xFF, which can be set manually. LoRa contains a 3-byte UUID. When there is no UUID, the low byte uses the RS485 address by default, that is, the UUID is 0x00, 0x00, 0xFF.

(5) Blue light - status indicator light, always on, indicating normal working status.

(6) Red light - flashes when powered on.

(7) Test button - dedicated for testing, when pressed, upload LoRa information.

Sensor Parameters

Sensor type	Measurement resolution	Measurement range	Measurement accuracy
CO2	1ppm	400ppm~5000ppm	±(50ppm+5%reading)
CH2O	1ppb	0~1ppm	≤0.1ppm: ±0.025ppm >0.1ppm: ±25% reading
TVOC	0.01ppm	0~10ppm	±10% reading
PM2.5	1ug/m3	0~1000ug/m3	≤ 100μg/m³: ± 10μg/m³ > 100μg/m³: ± 10% reading
PM10	1ug/m3	0~1000ug/m3	≤ 100μg/m³: ± 10μg/m³ > 100μg/m³: ± 10% reading
Temperature	0.01℃	-40-125°C (sensor data)	0.3℃（0-65℃）
Humidity	0.01%RH	0-100%RH	±3%RH

Project	Parameters	Notes
Operating voltage	12V
Working current	Standby 150mA, max <350mA
Warm up time	5 minutes
Working humidity	15%RH-80%RH (no condensation)
Lifetime	5 years (in the air)	The lifetime of formaldehyde is affected by the air concentration
Communication method	RS485, LORA	Bluetooth, CAT1 can be customized
Size	φ120mm42mm (diameterheight)	Diameter up to 134mm
Weight	180mg
Installation method	Ceiling installation

Instructions For Use

1. Turn on the external power supply, the sensor is preheated, the red and blue lights flash for 30s, the product will work normally (5 minutes of preheating is required for the data to be stable).

2. After preheating, the red indicator light is always on, indicating that the product is working normally.

3. After working normally, the device is on standby, waiting for the RS485 host or LoRa gateway to query the device data

4. When the test button is pressed, the blue light flashes once, and the device actively uploads sensor data through LoRa.

Installation Notes

1. Installation method 1: screw fixing.

Precautions For Using The Sensor

1. This product is suitable for ordinary application places, but not suitable for special environments such as high-concentration dust places, high-concentration organic gas (such as alcohol) places, and high-humidity places.

2. The formaldehyde sensor is a consumable electrochemical product. The high temperature and low humidity environment will reduce the service life of the module.

3. After the ambient temperature, humidity and air velocity are stable, the data is more accurate, and the unstable environment will cause the sensor indication to fluctuate

Protocol Description

LoRa Protocol

If you need to connect the LoRa protocol, please contact our technology.

Modbus Protocol

1. Definition of holding register address

Address	Register information	Measurement resolution	Measurement range	Operation
0x0000	CO2	1ppm	400ppm ~ 5000ppm	read only
0x0001	Formaldehyde	1ppb	0 ~ 1ppm	read only
0x0002	TVOC	0.01ppm	0 ~ 10ppm	read only
0x0003	PM2.5	1ug/m3	0ug/m3 ~ 1000ug/m3	read only
0x0004	PM10	1ug/m3	0ug/m3 ~ 1000ug/m3	read only
0x0005	Temperature	0.1℃	-40～125℃	read only
0x0006	Humidity	0.1%RH	0%RH～100%RH	read only
0x0007	VOC	0.01ppm	0～10ppm	read only

2、Example

Read PM2.5 real-time value of device address 0x01

Query frame:

Address code	function code	Start address	Data length	Check code low position	Check code high position
0x01	0x03	0x00 0x03	0x00 0x01	0x74	0x0A

Reply Frame:

Address code	function code	returns the number of valid bytes	PM2.5 value	Check code low position	Check code high position
0x01	0x03	0x02	0x00 0x12	0x38	0x49

PM2.5: 0012 H (hexadecimal)=18=>18ug/m3

Disclaimer OF Warranties

The company reserves the right to change this specification and update the product. The specification and product may be updated without prior notice without affecting the product quality and user usage. We are not responsible for any direct, indirect, intentional or unintentional damage and hidden dangers caused by improper use and out-of-specification use.

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