产品名称: PMT系列粉尘浓度变送器产品型号: PMT两线制4-20mA输出PMT系列粉尘浓度变送器是一款久负盛名、几乎免维护的一款电荷感应粉尘流动检测产品，能提供连续在线粉尘含量检测和除尘设备粉尘泄漏检测。探头工作原理：采用电荷感应和探头保护技术，当粉尘微粒流经探头附近的时，微弱的电信号感应进入到探头中，一个DSP数字信号处理器处理此感应信号，成为一个线性比例与粉尘威力质量含量的输出值。由于采用了探头保护技术和电荷感应技术，确保该探头能检测各种潮湿粉末和高导电粉尘，传感器为被动型(无电源和电子电路)，基本免维护，非常耐用。测量范围：>0.3微米的任何颗粒 探测等级：0.1PA 等效于0.1mg/m3， 0.5PA等效于0.5mg/m3，5.0PA等效于5.0mg/m3。输出：4-20mA优点：1.比传统的摩擦电原理的粉尘探头具有更高的可靠性2.满足美国国家*EPA认证3.对于各种腐蚀、粘稠气体、水比较多,需要仪表本身比较耐磨损和防堵塞的场合.应用场合各种管道气体输送粉料,气体加压运输等以及布袋除尘(收尘设备),高炉余压发电TRT粉尘保护.严格和传统的摩擦电原理粉尘探头区分.DWYER PMT系列粉尘浓度变送器特性：Service: Air and compatible gases, any type particulateconductiveor nonconductive.Wetted Materials: 304 SS and PTFE.Air Velocity Range: 300 ft/min and higher.Minimum Detection: Standard: 10.0 pA, Optional: 5.0 pA and0.5pA.Temperature Limits: Ambient: -15 to 160°F (-25 to 70°C);Process:Standard: -40 to 250°F (-40 to 120°C); Optional: -40 to450°F (-40to 232°C).Pressure Limit: 10 psi (0.69 bar).Power Requirement: 18-28 VDC (24V Nominal).Output Signal: 4-20 mA.Loop Resistance: 300 Ohms maximum.Current Consumption: Powered from 4-20 mA loop.Electrical Consumption: Terminal Block.Process Connection: See Model Chart on .Enclosure Rating: Weatherproof, NEMA 4X (IP 66).Mounting Orientation: Any.Weight: Varies with length of probe and type of mount.Agency Approvals: CE Ordinary locations only, CSA选型表EXAMPLE PMT A1 1 T1 P1 1 L1.5 PMT-A11T1P1-L1.5 Particulate Transmitter,ordinary/generalpurpose locations, CE approval, NEMA 4X, CSA, , 1/2" NPT connection, 250°F max.temp.,10 psi max. pressure, 10.0-5000 pA, 1.5" probe. SERIES DESIGNATOR PMT 　 　 　PMT Particulate Transmitter (1-piece configuration,sensorincluded in price) ENCLOSURE RATING 　 A1 　 　Ordinary/General Purpose Locations, CE Approval, NEMA 4X, CSA AHZ2 Hazardous Location, CSA Approval, Class I, Division II,GroupsA-D; Class II, 　 Groups F,G PROCESS CONNECTION 　 　1 　1/2" NPT 2 1.5" Quick Clamp Connection 3 2" 150# ANSI Flange 4 2" 150# ANSI Flange with Process Mating FlangeandInstallation Kit. MAXIMUM PROCESS 　 　 　T1 　 250°F (121°C) TEMPERATURE T2 450°F (232°C) MAXIMUM PROCESS 　 　P1 　 　10 psi PRESSURE RANGE 　 　 1 　 10.0-5000 pA 2 5.0-5000 pA 3 0.5-5000 pA (required for low levels or EPAleakdetection) INSERTION LENGTH 　 　 L1.5 1.5" Probe (recommended at L03 3" Probe least 1/2 duct diameter) L05 5" Probe 　 L10 10" Probe 　 L15 15" Probe 　 L20 20" Probe 　 L30 30" Probe 　 L36 36" Probe