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.
特性：
Service: Air and compatible gases, any type particulate conductive or 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 and 0.5 pA.
Temperature Limits: Ambient: -15 to 160°F (-25 to 70°C); Process: Standard: -40 to 250°F (-40 to 120°C); Optional: -40 to 450°F (-40 to 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/general purpose 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, sensor included in price) |
ENCLOSURE RATING | | A1 | | | | | | Ordinary/General Purpose Locations, CE Approval, NEMA 4X, CSA |
AHZ2 | Hazardous Location, CSA Approval, Class I, Division II, Groups A-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 Flange and Installation 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 EPA leak detection) |
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 |
