629系列 液用差压变送器监测气体或液体的差压，精度为0.5%，在设计上采用了两个压力传感器来测量差压，输出二线制的4-20mA。尺寸小的内部空间减少了移动部件范围，使得响应时间更短，可靠性更高。打开上盖就能很容易接线，调整零点和量程。629系列差压变送器达到NEMA 4X (IP66) 防护标准。
Service: Compatible gases and liquids.
Wetted Materials: Without valve: 316, 316L SS. Additional wetted parts with 3-way valve option: Buna-N, silicone grease, PTFE, brass 360, copper, reinforced acetal copolymer.
Accuracy: ±0.5% F.S. (includes linearity, hysteresis, and repeatability).
Temperature Limits: 0 to 200°F (-18 to 93°C).
Compensated Temperature Limits: 0 to 175°F (-18 to 79°C).
Pressure Limits: See Ordering page.
Thermal Effect: 0.02%/°F (0.036%/°C) includes zero and span.
Power Requirements: 13 to 30 VDC.
Output Signal: 4 to 20 mA. Optional 0-5 or 0-10 VDC.
Response Time: 50 msec.
Loop Resistance: 0-1300 ohms maximum for current output. For voltage outputs, minimum load resistance: 2000 ohms.
Electrical Connections: Terminal block; 1/2" female NPT conduit.
Process Connection: 1/4" female NPT.
Enclosure Rating: Designed to meet NEMA 4X (IP66).
Mounting Orientation: Mount in any position.
Weight: 10.1 oz (286 g).
Agency Approvals: CE.
NOTE: Pressures exceeding the working pressure limit may cause a calibration shift of up to ±3% of full scale.
