DWYER PMT系列粉尘浓度变送器的详细描述：
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绝对输出值。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.满足美国国家环保局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