Ammonia hydrogen sulfide 2-in-1 sensor transmitter detector RS485 high precision high sensitivity public toilet

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First, product introduction

Public toilets are urban public service infrastructure, and public toilets are safe and clean and directly affect the comfort of the city. As a world power, the toilet revolution has set off a national upsurge. The first-tier cities in the north and the north have successively proposed smart public toilets, and the smart public toilets are the direction of the toilet revolutionary road.

This product is officially developed in this context based on data transmission technology of IoT technology, accurate measurement of high-precision sensors, and rapid sensing of changes in environmental parameters. According to the needs of different customers, different types and quantities of sensors, different display modes, alarm modes, communication methods, etc. can be selected. It can also display data to computers, touch screens, LED screens, cloud platforms, etc. as needed.

This product has multiple protections such as lightning protection, anti-reverse connection, over-voltage, over-current and under-voltage. The product is fully interchangeable and is used to accurately measure the ambient temperature, ambient humidity, ammonia concentration, hydrogen sulfide concentration and other values. This product is output as a slave via a waterproof Ethernet RJ45 interface. The software is developed in full compliance with the standard MODBUS RTU/TCP/TCP communication protocol. Can be well compatible with WINCC, Kingview, Force Control, Kunlun Tongzhou, touch screen, PLC, cloud platform and other PC configuration software and hardware, as well as third-party software developed according to the standard MODBUS RTU/TCP/TCP protocol. Or hardware. And optional LCD screen display measurement data, after the limit of the buzzer sound alarm prompt, after the limit of the alarm relay drive alarm device action and other functions. This transmitter can be easily connected to the network equipment in the field for easy integration.

Can be widely used in: intelligent public toilets, landfills, basement environmental monitoring, environmental monitoring of waste recycling plants, and other occasions requiring ambient temperature and humidity, odor, odor.

In addition, products of different functions and different applications can be customized according to the technical requirements of the manufacturer.

Second, technical parameters

Air temperature and humidity sensor

Air temperature measurement range: -40~80°C

Air dew point temperature range: -40~80°C

Air temperature measurement accuracy: ±0.3 °C

Air temperature resolution: 0.1 °C

Air temperature drift: <±0.04°C/year

Air humidity measurement range: 0~100RH%

Air humidity measurement accuracy: ±2RH%@25°C (20%RH to 80%RH)

Air humidity resolution: 0.1% RH

Air humidity hysteresis: ±1% RH

Air humidity drift: <±0.5%RH/year

Working environment: -20~60°C, 5~95% RH

Ammonia Sensor & Hydrogen Sulfide Sensor

Ammonia NH3 Sensor：

Hydrogen H2S Sulfide Sensor：

Project|parameter

Detection gas|hydrogen sulfide (H2S)

Range 0~100ppm

Maximum measurement limit 500ppm

Sensitivity (0.8±0.15) wA/ppm

Resolution|0.1ppm

Response time (Ts0)|<30S

Bias omV

Load resistance (recommended) 109

Repeatability|<2% output value

Stability (/month)|<2%

Output linearity | linear

Zero drift (-20 ° C ~ 40 ° C) | ≤ 0.2ppm

Temperature range 20 ° C ~ 50 ° C

Humidity range|15%-90%RH

Pressure range|standard atmospheric pressure ±10%

Supply voltage: 7~26VDC, in addition to 5V or other voltage specifications.

Maximum power consumption: 500mA@12V with LCD (0802)

Display mode: LCD0802 LCD screen

LCD screen specifications: LCD0802 8 characters * 2 lines

Communication interface: RS485/Ethernet RJ45 interface

Communication protocol: MODBUS RTU/TCP

Communication rate: Software settings, 2400, 4800, 9600, 19200, 38400, 115200, etc. Default 9600bps

Data format: default 8N1 (1 bit start bit, 8 data bits, 1 stop bit, no parity)

Communication mode: The transmitter acts as a MODBUS RTU/TCP slave station, and the master station (touch screen, PLC, host computer, etc.) uses the master-slave polling method to query the real-time data of the transmitter.

Device address: 1~253, software settings.

Number of devices: theoretically up to 128 transmitters on the same bus, the actual application takes up 1/2~2/3

Transmission distance: 1000 meters (RS485 communication dedicated cable)

This product has been treated with three anti-prevention treatments before leaving the factory to ensure long-term use in high temperature, high humidity, high dust and corrosive gas environment.

Installation method: wall-mounted

Product size: 125mm*100mm*52mm

Third, the method of use

Hardware parts:

First plug the network cable into the waterproof Ethernet interface of the product, and connect the other end to the computer or router, hub, switch, etc., then connect your own switching power supply or the power adapter of the product to the power cable, or directly connect the power adapter to the DC. Plug the plug into the reserved power hole of the product.

Software parts:

According to your own system, choose to install 32-bit or 64-bit software. Generally, you only need to install modbus poll software. The following takes the WIN10 64-bit system as an example.

Click: I accept the terms of the license Agreement ---> Next ---> Next ---> Install ---> Next ---> Cancel the check box before Show Readme - ---> Finish

After the above steps, the software installation is complete.

Power on the device. After a few seconds of product initialization, open the test file provided by the company, you can see the data collected by the transmitter, as shown below.
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Modify the alarm value upper limit, lower limit, transmitter address, baud rate, check digit and other parameter methods to modify the transmitter address as an example

1 Mouse directly double-click the desired transmitter address value, ie 1, the following interface pops up:

2 Modify the value behind 1 to the actual required value, the range 1~253, 254 is the universal query address, address 254, only suitable for the case where the bus has only one device. Here we set the value of 1 to 3, and then click the Send button, the address of the current device, you can change to 3, the device does not need to power off, the new value automatically takes effect.

In order to better understand and learn the MODBUS RTU/TCP protocol, click on the menu bar Display--->Communication, you will see the instructions from the computer to get the data and the data returned by the transmitter; TX is the command issued by the computer. RX is the data returned by the transmitter

Six, matters needing attention

1. The transmitter is equipped with no test power supply and RS485 converter. If necessary, please contact the customer to purchase or purchase it yourself!

2. The power supply voltage and output current used must meet the requirements, otherwise the product may be damaged or may not work properly.

3. When connecting the transmitter cable, be careful not to connect it incorrectly, otherwise it may burn internal components or not work properly.

4. Please use RS485 special cable as much as possible to improve transmission distance and stability.

5. The transmitter station address setting must not be duplicated with other slave addresses.

6. The transmitter has built-in 120Ω termination resistor. When the transmitter is at the end of the 485 bus, please close the S3 shorting sleeve.

7, the transmitter slave station no more than 31, otherwise need to add RS485 bus bridge (relay), and the main station MODBUS RTU / TCP protocol, baud rate and other data formats must be consistent.

8. The default communication baud rate is 9600bps and 8N1 data format when the product leaves the factory. If the user needs to modify the baud rate or data format, we provide the program software to modify it.