英国CITY氨气传感器NH3 3E100SE氨气检测模块

4ECM-SMART模块使用手册产品描述SM ECM-SMAR电化学气体传感器模块是利用电化学原理，对环境中的CO、H2S、NO2等有毒有害气体浓度进行检测。

模块以盛密科技四系列三电极电化学传感器为敏感元件（传感器具体技术参数详见数据手册），在采样电路控制下实现气体浓度的检测，具有良好的稳定性、选择性。

本模块与接收终端采用四线制连接方式，将气体浓度信号通过UART总线输出，方便用户使用。

本品具有零偏压断电自动短接PIN脚功能，对于零偏压传感器，上电30分钟后即可稳定使用；对于带偏压的传感器，建议用户上电24小时以上再进行使用。

图1盛密4系列电化学传感器俯视图侧视图仰视图图2模块尺寸及引脚定义Vin GND TXD RXD 电源输入正极电源输入负极串口发送串口接收技术指标产品型号SM ECM-SMART检测气体CO、H2S、NO2等有毒有害气体检测原理电化学量程详见数据手册分辨率详见数据手册测量误差<±5%FS工作电压(3.5~5.5)VDC工作电流≤2mA@+5.0VDC输出方式UART(+3.3V TTL电平)工作温度-20℃~+50℃工作湿度0%~90%RH(无冷凝)工作压力1±0.1标准大气压存储温度-20℃~+60℃外形尺寸Φ24.2x26.8mm重量10克通讯设置波特率9600bps数据位8位停止位1位校验位无通讯命令本模块采用串口（TXD/RXD）进行数据传输，传输方式采用问答式。

数据传输均为16进制（HEX）格式。

无特殊说明时，应答回复时间小于100ms（特殊情况请参考具体指令说明），当前命令回复前无法响应其他指令。

1.终端读取模块信息命令示例：AA0F01C580EEByte1--AA：命令起始符；Byte2--0F：信息读取命令；Byte3--01：模块地址（默认为0x01）；Byte4--C5：CRC16（Modbus）；Byte5--80：CRC16（Modbus）；Byte6--EE：命令结束符；注：本命令中对Byte2、Byte3进行CRC16（Modbus）校验校验方法参照附录1模块应答（向终端发送信息数据）示例：AA0F010F001400050002000102C599EEByte1--AA：命令起始符；Byte2--0F：信息读取命令；Byte3--01：模块地址；Byte4--0F：传感器类型；Byte5/6--00/14：模块测量范围（16进制）Byte7/8--00/05：标定气体浓度（16进制）Byte9/10--00/02：高报警点（16进制）Byte11/12--00/01：低报警点（16进制）Byte13--02：传感器读数单位（%LEL：0x00；%VOL：0x01；PPM：0x02；PPB：0X03；无：0x04）Byte14--C5：CRC16（Modbus）；Byte15--99：CRC16（Modbus）；Byte16--EE：命令结束符；注：本命令中对Byte2~Byte13进行CRC16（Modbus）校验校验方法参照附录1附表:传感器类型代码（十进制）00无01无02CO03O204H205CH406无07CO208O309H2S10SO211NH312无13ETO14HCL15PH316无17HCN18无19HF20无21NO22NO223NOX 24CLO225无26无27无28无29无30无31THT32C2H233C2H434CH2O35无36无37无38无39C2H3CL40无41CH3SH例：AA0F010F001400050002000102C599EE（十六进制0F=十进制15，即得到该传感器为PH3传感器）2.终端发送浓度数据读取命令示例：AA0101C1E0EEByte1--AA：命令起始符；Byte2--01：数据读取命令；Byte3--01：模块地址；Byte4--C1：CRC16（Modbus）；Byte5--E0：CRC16（Modbus）；Byte6--EE：命令结束符；注：本命令中对Byte2、Byte3进行CRC16（Modbus）校验校验方法参照附录1模块应答（向终端发送浓度数据）示例：AA01018000000015CA EEByte1--AA：命令起始符；Byte2--01：数据读取命令；Byte3--01：模块地址；Byte4--80：数据符号位（0x80：负；0x00：正）；Byte5/6--00/00：数据（ppm）整数部分（0~65535）；Byte7--00：数据（ppm）小数部分（0.00~0.99）；Byte8--15：CRC16（Modbus）；Byte9--CA：CRC16（Modbus）；Byte10--EE：命令结束符；注：本命令中对Byte2~Byte7进行CRC16（Modbus）校验校验方法参照附录13.终端发送模块校零命令示例：AA0201C110EEByte1--AA：命令起始符；Byte2--02：校零命令；Byte3--01：模块地址；Byte4--C1：CRC16（Modbus）；Byte5--10：CRC16（Modbus）；Byte6—EE：命令结束符；注：1)本命令中对Byte2、Byte3进行CRC16（Modbus）校验；校验方法参照附录12)校零期间LED以1秒/次的频率闪烁，持续时间30秒。

Page 1/4Data sheet 201040Brief descriptionThis sensor can be used to measure ammonia (NH 3) in aqueous solutions. In an aqueous solution, ammonia is in a pH-dependent equilibrium with ammonium ions (NH 4+ ions). Provided the NH 4+ ions are converted into ammonia by adding lye, the sensor also detects the resultant ammonia. The NH 4+ ions themselves are not detected.The ammonia sensor consists of a pH glass electrode and a reference electrode. Both the electrodes are in an electrolyte. The electrolyte is separated from the process medium by a hydrophobic, gas-permeable membrane. The pH value of the electrolyte changes if NH 3 gas diffuses through the hydrophobic membrane. This local change in the pH value is measured at high resistance by the integrated pH electrode.JUMO ammonia sensors feature the advantage of having ready-made membrane caps. There is no need to put the sensitive membrane on by hand. With the JUMO sensor, the membrane cap is quickly and easily replaced as a complete unit.Monitoring ammonia leakage in refrigerating plantsRefrigerating plants (in indoor ice rinks or cold storage, for example) frequently use ammonia as a refrigerant. As ammonia (NH 3) is a toxic, pungent-smelling, colorless gas, the plants are monitored for escaping ammonia (leakage). Gas sensors are used to monitor the ambient air (these are not supplied by JUMO). In addition, the pipes and system components that carry the liquids are monitored for ammonia ingress. JUMO's ammonia-sensitive sensor can be used for this purpose. Measuring ammonia with a JUMO ammonia sensor gives a far more selective response than measuring the pH. The JUMO ammonia sensor can also be used in online analyzers/samplers or in the laboratory.More information can be found in JUMO white paper 631, "Information on measuring ammonia in water".Technical dataAnalyte aaThe sensor is used to detect NH 3 ammonia. It must not be used as a sensor for continuous measurement of NH 3 ammonia.NH 3Measuring range 0.01to 9,999ppm (mg/l) NH 3Temperature range Standard0to 50°C For low temperature (extra code 854)-8to +30°C pH range 7.5to 14Length 120mm Diameter 12mmConnection Pg13.5 screw-on head Medium pressureInstalled in quick-change fitting,part no. 003795382to 3bar (max.6bar)Not installed1bar abs. (atmospheric pressure)Membrane cap material Special PTFESuitable transmittersJUMO AQUIS 500 pH, see data sheet 202560JUMO dTRANS pH 02, see data sheet 202551Type 201040Ammonia-sensitive sensorfor ammonia measurements in aqueous solutionsPage 2/4Data sheet 201040Operating rangeNoteThe presence of ammonia in the sample medium is heavily dependent on its pH value (see diagram "Operating range"). Ammonium ions (NH 4+) predominate in the acidic range and are not detected by the sensor!At a pH of approximately 9.3, the concentration ratio of ammonia (NH 3) and ammonium (NH 4+) is about 1:1.Ammonia is only dominant in the reaction in the heavily alkaline range.The process medium must not contain any substances that could damage the sensor membrane (such as oils, greases, particles of dirt or surfactants).Dimensions(1)Only NH 4+ ions (ammonium) present (2)The ratio of NH 4+ ions (ammonium) and NH 3(ammonia) is 1:1(3)Only NH 3 ions present(1)Pg 13.5 screw-on head (2)Hose connection (silicone)(3)Shaft (PPO)(4)O-ring (FPM)(5)Sleeve (PSU)(6)Membrane cap (stainless steel 1.4571)(7)Membrane (PTFE)Page 3/4Data sheet 201040AccessoriesThe purpose of the manual quick-change fitting is to hold the ammonia sensor. It protects the sensor against excessively high pressures during operation and limits the flow rate of the process medium through the measurement chamber.The throughput of measuring fluid depends on the viscosity and temperature of the medium and the pressure in the line it flows through.PTFE washers for normal flow rate (white) or increased flow rate (black) are available as accessories.(1)G 1/8A (POM) hose connection (2)Material PP(3)Shaft (PPO)(4)Replaceable PTFE washer AClosedBOpenManual quick-change fitting Part no.: 00379538Optimum operating pressure 2to 4bar Maximum operating pressure 6bar Operating temperature-8to +50°CPage 4/4Data sheet 201040Order detailsNote:The type code is not a modular system.If possible, choose items listed under "stock versions" or "production versions" for your orders. We will have to technically inspect and approve a free combination of individual key features.Stock versions(delivery 3 working days after receipt of order)Accessories(1)Basic type 201040/65Ammonia sensor (2)Connection22Pg13,5 screw-on head (3)Insertion length 120120mm (standard)(4)Extra codes 000None854Low-temperature electrolyte(1)(2)(3)(4)Order code --/Order example201040/65-22-120/000TypeBrief descriptionPart no.201040/65-22-120/000Ammonia sensor, Pg13.5 screw-on head, 120mm 00440655201040/65-22-120/854Ammonia sensor, Pg13.5 screw-on head, 120mmfor use in highly concentrated refrigerants, -8to +30°C00478869TypePart no.Quick-change fitting for ammonia sensor 00379538Maintenance kit for ammonia sensor (standard)00449637Maintenance kit for ammonia sensor (code 854, temperature electrolyte)00477746202560/20-888-888-310-310-23/0000480051PTFE washers for manual quick-change fitting (standard, white, 3 washers)00583477PTFE washers for manual quick-change fitting (increased flow rate, black, 3 washers)00583479。

Ammonia Gas Sensor（Model：MQ137）ManualVersion: 1.4Valid from: 2015-03-10Zhengzhou Winsen Electronics Technology Co., LtdStatementThis manual copyright belongs Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways.Thanks for purchasing our product. In order to let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly in accordance with the instructions. If users disobey the terms or remove, disassemble, change the components inside of the sensor, we shall not be responsible for the loss.The specific such as color, appearance, sizes &etc, please in kind prevail.We are devoting ourselves to products development and technical innovation, so we reserve the right to improve the products without notice. Please confirm it is the valid version before using this manual. At the same time, users’ comments on optimized using way are welcome.Please keep the manual properly, in order to get help if you have questions during the usage in the future.Zhengzhou Winsen Electronics Technology CO., LTDMQ137 Ammonia Gas SensorProfileSensitive material of MQ137 gas sensor is SnO 2, which with lower conductivity in clean air. When NH 3 gas exists, t he sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ137 gas sensor has high sensitivity to NH 3 gas, also can monitor organic amine such as trimethylamine, cholamine well. It can detect kinds of gases including ammonia and is a kind of low-cost sensor for kinds of applications.FeaturesIt has good sensitivity to NH 3 gas in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.Main ApplicationsIt is widely used in domestic NH 3 gas alarm, industrial NH 3 gas leakage alarm, portable NH 3 gas detector.Technical Parameters table.1NOTE: The change of Output voltage(△Vs) is the difference value between V RL in test environment and V in clean air .Basic CircuitFig2. MQ137 Test CircuitInstructions: The above fig is the basic test circuit of MQ137.The sensorrequirestwo voltageinputs: heater voltage(V H ) and circuit voltage(V C ). V H is used to supply standard working temperature to the sensor and it can adopts DC or AC power, while V RL is the voltage of load resistance R L which is in series with sensor. Vc supplies the detect voltage to load resistance R Land it should adopts DC power.Description of Sensor CharactersNH3 AirCautions1 .Following conditions must be prohibited1.1 Exposed to organic silicon steamSensing material will lose sensitivity and never recover if the sensor absorbs organic silicon steam. Sensors must be avoid exposing to silicon bond, fixature, silicon latex, putty or plastic contain silicon environment. 1.2 High Corrosive gasIf the sensors are exposed to high concentration corrosive gas (such as H 2S, SO X , Cl 2, HCl etc.), it will not only result in corrosion of sensors structure, also it cause sincere sensitivity attenuation. 1.3 Alkali, Alkali metals salt, halogen pollutionThe sensors performance will be changed badly if sensors be sprayed polluted by alkali metals salt especially brine, or be exposed to halogen such as fluorine.1.4 Touch waterSensitivity of the sensors will be reduced when spattered or dipped in water. 1.5 FreezingDo avoid icing on sensor’s surface, otherwise sensing material will be broken and lost sensitivity. 1.6 Applied higher voltageApplied voltage on sensor should not be higher than stipulated value, even if the sensor is not physically damaged or broken, it causes down-line or heater damaged, and bring on sensors’ sensitivity characteristic changed badly.1.7 Voltage on wrong pinsFor 6 pins sensor, Pin 2&5 is heating electrodes, Pin (1,3)/(4,6) are testing electrodes (Pin 1 connects with Pin 3, while Pin 4 connects with Pin 6).If apply voltage on Pin 1&3 or 4&6, it will make lead broken; and no signal putout if apply on pins 2&4.Fig7. Lead sketch2 .Following conditions must be avoided 2.1 Water CondensationIndoor conditions, slight water condensation will influence sensors’ performance lightly. However, ifwater condensation on sensors surface and keep a certain period, sensors ’ sensitiv e will be decreased. 2.2 Used in high gas concentrationNo matter the sensor is electrified or not, if it is placed in high gas concentration for long time, sensorscharacteristic will be affected. If lighter gas sprays the sensor,it will cause extremely damage. 2.3 Long time storageThe sensors resistance will drift reversibly if it’s stored for long time without electrify, this drift is related with storage conditions. Sensors should be stored in airproof bag without volatile silicon compound. For the sensors with long time storage but no electrify, they need long galvanical aging time for stability before using. The suggested aging time as follow:Stable2.No matter the sensors electrified or not, if exposed to adverse environment for long time, such as high humidity, high temperature, or high pollution etc., it will influence the sensors’ performance badly. 2.5 VibrationContinual vibration will result in sensors down-lead response then break. In transportation or assembling line, pneumatic screwdriver/ultrasonic welding machine can lead this vibration. 2.6 ConcussionIf sensors meet strong concussion, it may lead its lead wire disconnected. 2.7 Usage Conditions2.7.1For sensor, handmade welding is optimal way. The welding conditions as follow: ● Soldering flux: Rosin soldering flux contains least chlorine ● homothermal soldering iron ● Temperature ： 250℃ ● Time：less than 3 seconds2.7.1If users choose wave-soldering, the following conditions should be obey: ● Soldering flux: Rosin soldering flux contains least chlorine ● Speed: 1-2 Meter/ Minute● Warm-up temperature ：100±20℃ ● Welding temperature ：250±10℃●One time pass wave crest welding machineIf disobey the above using terms, sensors sensitivity will be reduced.。

氨逃逸传感器校准记录表摘要：一、氨逃逸传感器简介1.氨逃逸传感器的作用2.氨逃逸传感器的工作原理二、氨逃逸传感器校准的重要性1.确保传感器准确测量2.提高传感器使用寿命3.降低误差对环境和人体健康的影响三、氨逃逸传感器校准流程1.准备校准设备2.选择合适的校准方法3.进行校准操作4.记录校准结果四、氨逃逸传感器校准记录表1.记录表的组成部分2.填写记录表的要求3.分析校准结果正文：氨逃逸传感器是一种用于检测环境中氨气浓度的设备，对于环境保护、农业生产、公共卫生等领域具有重要作用。

然而，传感器在使用过程中可能会出现测量误差，因此需要定期进行校准，以确保传感器的准确测量。

氨逃逸传感器校准的重要性体现在以下几个方面：首先，准确的测量结果有助于更好地监控和控制氨气的排放，从而降低对环境和人体健康的影响。

其次，定期校准可以延长传感器的使用寿命，降低设备故障的风险。

最后，准确的测量结果有助于提高相关研究的可靠性和准确性。

进行氨逃逸传感器校准的流程如下：首先，需要准备相应的校准设备，包括标准气体、气瓶、压力表等。

其次，根据传感器的类型和性能选择合适的校准方法。

接着，按照校准方案进行操作，包括校准零点、校准量程等。

最后，记录校准过程中的关键数据，包括校准结果、校准日期、操作人员等信息，并填写氨逃逸传感器校准记录表。

氨逃逸传感器校准记录表是记录校准过程和结果的重要文件，通常包括校准设备、校准方法、校准结果等栏目。

在填写记录表时，需要注意信息的准确性和完整性，以便于后续对校准结果进行分析和处理。

总之，氨逃逸传感器校准对于保证传感器准确测量、提高设备使用寿命和降低误差对环境和人体健康的影响具有重要意义。

PS-NH3-100型氨气检测模组使用说明书深圳市普晟传感技术有限公司版权声明本手册版权为深圳市普晟传感技术有限公司所有，未经深圳市普晟传感技术有限公司书面许可，任何单位和个人不得摘录、复制、翻译、注释、编辑本手册的部分或全部内容，侵权必究。

为使您更好地使用本公司产品，请务必仔细阅读本说明书并按照所建议的使用方法进行使用。

对于不按照使用说明进行操作或因擅自去除、拆卸、更换传感器内部组件而对本产品造成的损坏，本公司不承担相应损失。

本公司以客户需求为导向，追求高品质的客户体验与高质量的技术创新，欢迎新老客户与我司进行产品应用探讨。

手册版本号：PS-NH3-100-V 1.0深圳市普晟传感技术有限公司 2020年12月1日产品简介PS-NH3-100型氨气检测模组是我公司针对现有氨气传感器无法实现超低浓度氨气检测以及寿命短等缺陷推出的全新产品，模组采用基于燃料电池原理的选择性高精度氨气传感器结合先进的微检测技术，直接将环境中的氨气气体含量转换成浓度值，标准化数字输出，便于客户集成使用。

PS-NH3-100型氨气检测模组不受环境中常见干扰物的影响，可实现选择性检测环境中的氨气气体含量，为您提供测试场所内氨气含量的精准检测。

特点典型应用选择性检测氨气厕所测量精度高养殖场响应速度快绿建使用寿命长检测仪/监测仪稳定可靠智能家居低功耗……管脚定义管脚名称管脚说明1 Vin(5V)2 GND3 RXD (0～3.3V 数据输入)4 TXD( 0～3.3V 数据输出)结构尺寸技术指标产品型号PS-NH3-100检测原理燃料电池检测气体氨气检测量程0-100ppm最大过载200ppm供电电压 4.5-7V预热时间<3min 响应时间（T）<120S90) <180S 恢复时间 (T10分辨率0.01ppm工作温度-40℃～70℃工作湿度10％－90％RH（非凝结）使用寿命3年（正常使用）质保期12个月重量10g通讯协议➢通用设置传感器模块使用串行通讯方式，通讯配置参数如下：波特率9600数据位8位停止位1位校验位无➢通讯命令通讯分主动上传和问答式，出厂默认为主动上传，每隔1秒发送1次浓度值。

R e v . 09/2006AmmoniaSensoriC NH3 3E 100 SESensoriC deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.R e v . 0 9 / 2 0 0 6SensoriC NH3 3E 100 SEFEATURESAmperometric3 electrode sensor cellVery stable zero readingVery selectiveHighly sensitiveHydrous electrolyteTYPICAL APPLICATIONSTLV-monitoring, leakage detectionportable & fixed point applicationsFood & Refrigeration Industry, General Industry, Semiconductor IndustryPART NUMBER INFORMATIONMINI1845-932-30009SENSORIC CLASSIC1845-932-30069CTL 4 series adaptation1845-932-30049CTL 7 series adaptation1845-932-30079SensoriC deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.R e v . 0 9 / 2 0 0 6TECHNICAL SPECIFICATIONSMeasuring Range0–100 ppmSensitivity Range130 nA/ppm±30 nA/ppmZero Current at 20°C< ±100 nAResolution at 20°C< 1 ppmBias Potential0 mVLinearity< 10% full scaleResponse Time at 20°Ct50< 20 s calculated from 5 min. exposure timet90< 60 s calculated from 5 min. exposure time Long Term Sensitivity Drift< 5% per 6 monthsOperation ConditionsTemperature Range-20°C to +40°CHumidity Range15–90% r.H, non–condensingEffect of HumiditySensor Life Expectancy> 24 months in air*Warranty12 monthsNote:* Background concentrations of ammonia might shorten life time of sensor . SensoriC NH3 3E 100 SESensoriC deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted. The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.R e v . 09/2006020406080100120140160180-30-20-1001020304050tem perature [°C]s e n s i t i v i t y [n A /p p m ]OUTPUT vs. TEMPERATURE:SensoriC NH3 3E 100 SESensoriC deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted. The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.R e v . 09/2006-4-3-2-101234-30-20-101020304050temperature [°C]z e r o r e a d i n g [p p m ]ZERO READING vs. TEMPERATURE:SensoriC NH3 3E 100 SESensoriC deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.R e v . 0 9 / 2 0 0 6Cross Sensitivities at 20°CGas Concentration Reading [ppm]Alcohols1000 ppm0Carbon Dioxide5000 ppm0Carbon Monoxide100 ppm0Hydrocarbons% range0Hydrogen10000 ppm0Hydrogen Sulfide20 ppm211) Short gas exposure in minute range.Notes:1.Interference factors may differ from sensor to sensor and with life time. It is not adviseable to calibrate with interference gases.2.This table does not claim to be complete. The sensor might also be sensitive to other gases.SensoriC NH3 3E 100 SE。

特殊气体传感器（型号：MQ137）使用说明书版本号：1.3实施日期：2014-05-01郑州炜盛电子科技有限公司Zhengzhou Winsen Electronic Technology Co., Ltd声明本说明书版权属郑州炜盛电子科技有限公司（以下称本公司）所有，未经书面许可，本说明书任何部分不得复制、翻译、存储于数据库或检索系统内，也不可以电子、翻拍、录音等任何手段进行传播。

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郑州炜盛电子科技有限公司MQ137氨气传感器产品描述MQ137气体传感器所使用的气敏材料是在清洁空气中电导率较低的二氧化锡(SnO2)。

当传感器所处环境中存在氨气时，传感器的电导率随空气中氨气的浓度的增加而增大。

使用简单的电路即可将电导率的变化转换为与该气体浓度相对应的输出信号。

MQ137气体传感器对氨气的灵敏度高，对其它有机胺（如三甲胺、乙醇胺等）的监测也很理想。

这种传感器可检测多种含氨气体，是一款适合多种应用场合的低成本传感器。

传感器特点本品在较宽的浓度范围对氨气有良好的灵敏度，具有长寿命、低成本、驱动电路简单等优点。

主要应用广泛适用于家庭用氨气报警器、工业用氨气泄漏报警器以及便携式氨气检测器。

技术指标表 1产品型号产品类型标准封装检测气体检测浓度回路电压加热电压负载电阻加热电阻加热功耗灵敏度MQ137半导体气体传感器胶木，金属罩氨气5～500ppm氨气≤24V DC标准电路条件标准测试条件下气敏元件特性V cV HR L5.0V±0.1V AC or DC可调R H 29Ω±3Ω（室温）≤900mWP HS Rs(in air)/Rs(50ppmNH3)≥2≥0.5V (in 50ppm NH3)输出电压△Vs浓度斜率α≤0.6(R200ppm/R50ppm NH3)温度、湿度20℃±2℃；55%±5%RHVc:5.0V±0.1V；V H: 5.0V±0.1V标准测试条件标准测试电路预热时间不少于48小时图 1 传感器结构图注：输出电压变化量（△Vs）是指在测试气氛中的V RL与洁净空气中的V RL的差值基本电路图2 MQ137测试电路说明：上图为MQ137传感器的基本测试电路。

®Tel:+44 23 9232 5511, .ax:+44 23 9238 6611, sensors@, Doc. Ref.:3N...p65Performance CharacteristicsNominal Range Maximum Overload Inboard .ilter Expected Operating Life Output Signal Resolution Operating Temperature Range *see Note1Pressure Range Pressure Coefficient T 90 Response Time Relative Humidity Range Typical Baseline Range (pure air)Maximum Zero Shift (+20°C to +40°C)Long Term Output Drift Recommended Load ResistorBias Voltage Repeatability Output Linearity 0-1000ppm 5000ppmTo remove effect of SO 2 influe streamThree years in air0.10 ± 0.02 µA/ppm1ppm-20°C to +40°CAtmospheric ± 10%0.01% signal/mBar ≤25 seconds15 to 90% non-condensing 0 to +12ppm equivalent30ppm equivalent <2% signal loss/month10 Ω+300mV 2% of signal LinearPhysical CharacteristicsWeightPosition SensitivityStorage LifeRecommended StorageTemperatureWarranty Period22g NoneSix months in CTL container 0-20°C12 months from date of despatchNote1:While not being used to measure NO the 3N./. canwithstand temperatures of up to +50°CN.B.All performance data is based on conditions at 20°C,50%RH, and 1013mBar深圳市深国安电子科技有限公司Ｓｈｅｎｚｈｅｎ　Ｓｉｎｇｏａｎ　Ｅｌｅｃｔｒｏｎｉｃ　Ｔｅｃｈｎｏｌｏｇｙ　Ｃｏ．，ＬｔｄＣＩＴＹ传感器代理及气体检测仪商ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍEvery effort has been made to ensure the accuracy of this document at the time of printing. In accordance with the company s policy of continued product improvement City Technology Limited reserves the right to make product changes without notice. No liability is accepted for any consequential losses, injury or damage resulting from the use of this document or from any omissions or errors herein. The data is given for guidance only. It does not constitute a specification or an offer for sale. The products are always subject to a programme of improvement and testing which may result in some changes in the characteristics quoted. As the products may be used by the client in circumstances beyond the knowledge and control of City Technology Limited, we cannot give any warranty as to the relevance of these particulars to an application. It is the clients responsibility to carry out the necessary tests to determine the usefulness of the products and to ensure their safety of operation in a particular application.Performance characteristics on this data sheet outline the performance of newly supplied sensors. Output signal can drift below the lower limit over time.The 3N./. Nitric Oxide CiTiceL is available with side tags, gold-plated PCB pins, or both PCB pins and side tags. To ensure the appropriate option is supplied care must be taken to provide the correct code when ordering.Ordering InformationCross-sensitivity DataCiTiceLs may exhibit a response to certain gases in a sample other than the target gas. The table below shows the typical response of 3N./. sensors to a number of common cross-interfering gases. The figures are expressed as a percentage of the primary sensitivity (i.e. nitric oxide = 100%).。

氨气传感器原理氨气传感器是一种用于测量空气中氨气浓度的仪器，它可以广泛应用于农业、环境保护、工业等领域。

传感器的原理是基于氨气的电化学反应，在电极上产生电流或电压信号，进而测量氨气浓度。

本文将介绍氨气传感器的原理及其应用。

氨气传感器主要使用的传感元件是氨气电化学传感器，它利用氨气的电化学反应测量氨气的浓度。

一般来说，氨气电化学传感器由三个基本部分组成：工作电极、参考电极和电解质。

1. 工作电极：在氨气溶液中，工作电极表面的铂金属上发生氧化还原反应，其中氧化反应是把氨气氧化为氮气，还原反应是把氧气还原为水。

这些反应产生的电流或电势与氨气浓度成正比。

2. 参考电极：参考电极通常使用银/银氯化物电极或银电极。

3. 电解质：电解质通常是含有钾离子的盐水溶液，它的主要作用是传递离子电流。

当氨气接触到工作电极时，它会发生电化学反应，产生电荷，并且改变电化学反应的方向。

在测量过程中，电解质中的外部电源引起的电流可以表示氨气与铂电极之间的交互作用。

随着氨气浓度的增加，工作电极中反应的速率随之增加，电位变化也随之增大。

电位或电流的测量可以被用来评估气体浓度。

二、应用领域1. 农业：氨气传感器可用于测量畜禽场等场所的氨气浓度，帮助农民了解空气质量，保护动物健康，减少氨气的挥发和排放，改善环境质量。

2. 工业：氨气传感器可以用于化学处理、卫生清洁、医药制造和其他工业应用中氨气检测，以保护工人健康和安全，防止化学品泄漏和火灾等意外事故发生。

3. 环境保护：氨气传感器可用于测量高氨气浓度的空气污染源，例如农场、污水处理厂、化肥工厂、垃圾填埋场等，掌握状况，制定控制策略，减少氨气排放对环境的影响。

4. 医学：氨气是肝脏疾病的重要生物指标，它能够反映肝脏的代谢活动和功能状态。

利用氨气传感器可以测量人体呼出气中的氨气浓度，从而诊断肝脏疾病。

氨气传感器具有测量范围广、响应时间快、灵敏度高、可重复使用等优点，可以满足不同领域的需求，为实现环保和保障人的健康发挥重要作用。