麻花星空mv天美

*次坐飞机。想问空姐要一杯水。
当时出现了一个问题，不知道应该怎么称呼空姐。
想了想，是不是要叫&濒诲辩耻辞;服务员&谤诲辩耻辞;，但是这样显然会暴露我*次坐飞机的本质，*没有逼格。&濒诲辩耻辞;服务员&谤诲辩耻辞;这么鬼？是饭馆么？显然不行。
于是，在我紧张飞速的思绪转动之后，冒出这么一句&尘诲补蝉丑;&尘诲补蝉丑;&濒诲辩耻辞;师傅，麻烦您给我倒一杯果汁！&谤诲辩耻辞;

Dwyer 677B系列 差压变送器

品牌：dwyer  
产物描述：
NEMA 4 外壳，整体安装
Series 677B Differential Pressure Transmitters Are Designed To Measure Pressures As Low As 0.1 In W.C. With ±0.4% Accuracy. Use Series 677B For Building Energy Management Systems, Environmental Pollution Control, Oven Pressurization, Lab And Fume Hood Control, HVAC And VAV Applications. The Transmitter Features 15 Psid Overpressure, Reverse Polarity Protection And EMI/RFI Protection. Internal Regulation Permits Use With Unregulated DC Power Supplies. The NEMA 4 Housing Allows For Versatile Mounting Locations And Integral Mounting Tabs Simplify Installation.
Dwyer 677B系列 差压变送器
Service: Air And Non-Conductive, Non-Corrosive Gases.
Wetted Materials: 302 SS, Glass, Nickel, Silicone Rubber And Brass.
Accuracy: ±0.4% FS* At Room Temperature. *RSS Includes Non-Linearity, Hysteresis And Non-Repeatability.
Stability: ±1% FS/Yr.
Temperature Limits: 
Operating And Compensated: 0 To 185°F (-18 To 85°C);
Storage: -65 To 220°F (-54 To 105°C).
Pressure Limit: 15 Psi (100 KPa).
Thermal Effects: (Includes Zero And Span) <0.028% FS/°F, 0 To 185°F (-18 To 85°C).
Power Requirements: 16 To 32 VDC.
Output: 4 To 20 MA DC, 2-Wire.
Zero And Span Adjustments: Internally Accessible Potentiometers, Noninteractive.
Response Time: Approximay 10 Ms.
Max. Loop Resistance: DC: 0 To 800 Ohms.
Process Connection: 3/16" OD Barbed Brass Pressure Fitting.
Enclosure Rating: NEMA 4 (IP65).
Weight: 11.5 Oz (330 G).
Agency Approval: CE.
Dwyer 677B系列 差压变送器
附件:
NISTCAL-PT1 - NIST Traceable Calibration Certificate For Pressure Transmitters.
A-302F-A - 303SS Static Pressure Tip With Mounting Flange, 4" Hook Style. For 3/16" ID Rubber Or Plastic Tubing, Includes Mounting Screws.
A-489 - 4" 303 SS Straight Static Pressure Tip With Flange.