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LEFOO Differential Pressure transmitters measure the difference between two pressures. This high accuracy differential pressure transducer features 4-20mA+Hart technology to deliver accurate outputs for Data collection and control devices. With Protection Level IP66 that suitable for measuring liquid, gas, or steam characterized by the remote seal construction. The unique combination of several sensor systems in a single device allows simultaneous measurement of differential pressure and absolute pressure... Commonly used in areas of application for Monitoring filters and fans and level measurement of closed containers. Accuracy 0.05%, (Customizirable accuracy 0.025%~0.2%)
| LFT710 | LFT710 Intelligent Differential Pressure Transmitter |
| Code 1 | Measuring range |
| B | 0．2~6 KPa |
| C | 1.0~40KPa |
| D | 2.5~250KPa |
| E | 10~1000KPa |
| F | 30~3000KPa |
| Code 2 | Output |
| E | Standard intelligent (4~20) mA DC two-wire system + HART protocol digital communication |
| J | Standard intelligent (4-20) mA DC two-wire system + HART protocol digital communication + square signal output |
| Code 3 | Isolation diaphragm |
| 22 | 316L Stainless steel |
| 23 | Hastelloy C |
| 24 | Monel |
| 25 | Tantalum |
| Code 4 | Filling fluid |
| D | Silicone oil |
| F | Fluorine oil |
| Code 5 | Electrical Interface |
| M | M20×1.5internal thread |
| N | 1/2NPTinternal thread |
| Code 6 | Relief valve position |
| A | No relief valve (with plug) |
| B | Upper side of process flange |
| C | Lower part of the process flange side |
| Code 7 | Mounting brackets |
| N | Without mounting bracket |
| B1 | Tube bending bracket (carbon steel) |
| B2 | Panel mounting bracket (carbon steel) |
| B3 | Tube mounted flat bracket (carbon steel) |
| B5 | Tube bending bracket (stainless steel) |
| B6 | Pan-mounted curved bracket (stainless steel) |
| B7 | Tube mounted flat bracket (stainless steel) |
| Code 8 | Static pressure |
| A | 10MPa |
| B | 16Mpa |
| C | 20MPa |
| Code 9 | Explosion-proof grade |
| N | Common type (no explosion-proof) |
| D | Flameproof ExdⅡCT6 |
| I | Intrinsically safe explosion-proof type ExiaⅡCT6 |
| Code 10 | Accuracy class |
| 2 | 0.2 |
| 5 | 0.5 |
| 7 | 0.075 |
| 6 | 0.065 |
| 8 | 0.05 |
Option code | Option |
N | With "waist" shaped joint: NPT1/2 taper pipe internal thread |
J | With "T" shaped joint: M20×1.5 external thread and welding pressure tube (stainless steel) at the rear |
F | With "waist" shaped joint plus NPT1/2 pressure transfer head and back welding pressure tube (stainless steel) |
P | No process connection (l/4 NPT female thread on chamber flange) |
K | Degreasing and washing treatment |
L | Hanging tag |
H | Lightning protection (transient voltage resistance) |
E | English nameplate |
V3 | Three valve group |
V5 | Five valve group |
M5 | LCD liquid crystal display |
N | No header |
Electromagnetic compatibility schedule
No. | Test items | Basic standard | Test Conditions | Performance level |
1 | Radiation interference (housing) | GB/T 9254-2008 Table 5 | 30MHz～1000MHz | Qualified |
2 | Conducted interference (DC power port) | GB/T 9254-2008 Table1 | 0.15MHz～30MHz | Qualified |
3 | Electrostatic discharge (ESD) immunity | GB/T 17626.2-2006 | 4kV(Contact) 8kV(Air) | B |
4 | RF electromagnetic field immunity | GB/T 17626.3-2006 | 10V/m (80MHz～1GHz) | A |
5 | Power frequency magnetic field immunity | GB/T 17626.8-2006 | 30A/m | A |
6 | Electrical fast transient pulse group immunity | GB/T 17626.4-2008 | 2kV(5/50ns,5kHz) | B |
7 | Surge immunity | GB/T 17626.5-2008 | 1kV（Between lines） 2kV（Between line and ground）(1.2us/50us) | B |
8 | RF field induced conducted interference immunity | GB/T 17626.6-2008 | 3V(150KHz～80MHz) | A |
Standard
（Adjust the range based on the standard zero points, stainless steel 316L diaphragm, filling fluid is silicone oil）
1：Performance specifications
Adjust the reference accuracy of the range
（Including linearity, hysteresis, and repeatability from zero）
± 0.075%
If TF>10 (TF=Maximum range/adjustment range) then：
±(0.0075×TF)%
The square root output accuracy is 1.5 times the above linear reference accuracy
Optional highest accuracy 0.05%.
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Configurable using zero/span buttons mean no calibrator required reducing time to install and running
Range-ability and selectable engineering units, allows the transmitter to fit many applications reducing the number of different transmitters to meet specifications
High accuracy (±0.075%) provides an exceptional measurement for ensuring tight control and minimizing costly out of specification conditions
Automatic sensor temperature compensation improves the performance of the device for accurate measurement under different operating environments
Fail-mode process function stores configuration settings in the event of shutdown or power-loss provide for faster restart to getting application back on-line
A HART® Communication programmable device provides a reliable, long-term solution for plant operators who seek the benefits of intelligent devices with digital communication
Designed for water and high risk gas
Flow measurement Level monitoring
Filter or pump differential pressure
Critical process monitoring
Closed Tank Level, Density, Filter health
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