DWYER PMT系列粉塵濃度變送器的詳細描述：
產品名稱: PMT系列粉塵濃度變送器
產品型號: PMT
兩線制4-20mA輸出
PMT系列粉塵濃度變送器是一款久負盛名、幾乎免維護的一款電荷感應粉塵流動檢測產品，能提供連續在線粉塵含量檢測和除塵設備粉塵泄漏檢測。
探頭工作原理：采用電荷感應和探頭保護技術，當粉塵微粒流經探頭附近的時，微弱的電信號感應進入到探頭中，一個DSP數字信號處理器處理此感應信號，成為一個線性比例與粉塵威力質量含量的輸出值。由于采用了探頭保護技術和電荷感應技術，確保該探頭能檢測各種潮濕粉末和高導電粉塵，傳感器為被動型(無電源和電子電路)，基本免維護，非常耐用。
測量范圍：>0.3微米的任何顆粒 探測等級：0.1PA 等效于0.1mg/m3， 0.5PA等效于0.5mg/m3，5.0PA等效于5.0mg/m3。
輸出：4-20mA
優點：
1.比傳統的摩擦電原理的粉塵探頭具有更高的可靠性
2.滿足美國國家*EPA認證
3.對于各種腐蝕、粘稠氣體、水比較多,需要儀表本身比較耐磨損和防堵塞的場合.
應用場合
各種管道氣體輸送粉料,氣體加壓運輸等以及布袋除塵(收塵設備),高爐余壓發電TRT粉塵保護.嚴格和傳統的摩擦電原理粉塵探頭區分.
DWYER PMT系列粉塵濃度變送器
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
選型表
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
