Product Introduction:
XG3051LT is a 3051 series single flange remote differential pressure liquid level transmitter. Based on the principle of capacitive sensing, the flange isolation diaphragm directly contacts the measured medium, converting the static pressure differential generated by the liquid level into 4-20mA+HART digital signal output. It is specifically used to solve the problem of high viscosity, easy crystallization, easy sedimentation, and strong corrosion medium liquid level measurement, eliminating the need for pressure pipes and avoiding pipeline blockage.
Application industry:
1. Petrochemical industry: measurement of liquid levels in reaction vessels, storage tanks, viscous materials, easily crystallizable media, and two-phase interfaces.
2. Water treatment environmental protection: monitoring of liquid levels in sewage tanks, chemical storage tanks, sludge tanks, and suspended solids media.
3. Pharmaceutical industry: liquid levels in reaction tanks, ingredient tanks, highly corrosive drugs, and sanitary tank levels.
4. Food and beverage: high viscosity materials such as sauces and syrups can be stored in tanks with optional sanitary flange structures.
General Conditions
The level flange transmitter can be directly mounted at any position.
The optimal installation condition is to keep the axis of the process flange vertical. Any positional deviation will cause a correctable zero shift. The electronics housing can be rotated up to 360°, and set screws can secure it in any position.
Environmental conditions
| Ambient Temperature | |
| Minimum | Depends on fill fluid |
| Maximum | 85 °C |
| With local display and FKM seals | −20 ~ 65 °C |
| Storage / Transportation Temperature | |
| Minimum | Depends on fill fluid |
| Maximum | 85 °C |
| Relative Humidity | 0 ~ 100 % |
| Shock Resistance | |
| Acceleration | 50 g |
| Duration | 11 ms |
| Vibration Resistance | 2 g up to 500 Hz |
| EMC (Electromagnetic Compatibility) | See Table 3 "EMC Appendix" |
Process medium limit temperature limit
Medium temperature:-30~180°C
| Medium Temperature Limit | −30 ~ 180 °C |
| Transmitter Body Pressure Limits | From 3.5 kPa absolute pressure up to rated pressure. Overpressure protection can reach 1.5 times the rated pressure, applied to both sides of the transmitter simultaneously. |
| Level Flange Rated Pressure | |
| ANSI Standard | 150 psi ~ 600 psi |
| DIN Standard | PN 1.6 MPa ~ PN 10 MPa |
| Single-Sided Overload Limit | Low-pressure side: rated pressure of transmitter body; High-pressure side: rated pressure of level flange. Correctable zero drift may occur. |
| Weight | DN 50/2": approx. 7 ~ 10 kg |
| DN 80/3": approx. 8 ~ 11 kg | |
| DN 4": approx. 9 ~ 12 kg | |
| Explosion Protection | |
| NEPSI Flameproof Approval | Ex dⅡC T6 |
| NEPSI Intrinsically Safe Approval | Ex iaⅡC T4 |
| Permissible Operating Temperature | −40 °C ~ 65 °C |
| Power Supply and Load Conditions | |
| Supply Voltage | 24 V |
| Load Formula | R ≤ (Us − 12 V)/Imax kΩ where Imax = 23 mA |
| Max. Supply Voltage | 42 VDC |
| Min. Supply Voltage | 12 VDC; 15 VDC (for backlit LCD display) |
| Digital Communication Load Range | 230 ~ 600 Ω |
| Materials | |
| Measuring Capsule | 316L Stainless Steel |
| Diaphragm | 316L Stainless Steel, Hastelloy C, Tantalum, FEP, PFA, PTFE coating |
| Process Flange | 304 Stainless Steel |
| Fill Fluid | Silicone oil, Vegetable oil |
| Gasket | Nitrile rubber (NBR), Fluoroelastomer (FKM), PTFE |
| Transmitter Housing | Aluminum alloy with epoxy coating on surface |
| Housing Seal | Nitrile rubber (NBR) |
| Nameplate | 304 Stainless Steel |
| Electrical Connection | M20×1.5 cable gland. Terminals suitable for conductors of 0.5 ~ 2.5 mm² |
| Process Connection | Low-pressure side of transmitter: UNF 7/16" internal thread.Level flange on high-pressure side complies with ANSI or DIN standards. Direct mounting available, refer to dimension drawing. |
| Enclosure Protection Rating | IP67 |
| Table 3 EMC Appendix | ||||
| No. | Test Item | Basic Standard | Test Condition | Performance Level |
| 1 | Radiated Emission (Enclosure) | GB/T 9254-2008 Table 5 | 30 MHz ~ 1000 MHz | Pass |
| 2 | Conducted Emission (DC Power Port) | GB/T 9254-2008 Table 1 | 0.15 MHz ~ 30 MHz | Pass |
| 3 | Electrostatic Discharge (ESD) Immunity | GB/T 17626.2-2006 | 4 kV (Contact) 8 kV (Air) | B |
| 4 | Radiated RF Electromagnetic Field Immunity | GB/T 17626.3-2006 | 10 V/m (80 MHz ~ 1 GHz) | A |
| 5 | Power Frequency Magnetic Field Immunity | GB/T 17626.8-2006 | 30 A/m | A |
| 6 | Electrical Fast Transient / Burst Immunity | GB/T 17626.4-2008 | 2 kV (5/50 ns, 5 kHz) | B |
| 7 | Surge Immunity | GB/T 17626.5-2008 | 1 kV (Line-to-Line)2 kV (Line-to-Earth) (1.2 us/50 us) | B |
| 8 | Conducted Disturbance Immunity Induced by RF Fields | GB/T 17626.6-2008 | 3 V (150 kHz ~ 80 MHz) | A |
Notes:
(1) Performance Level A: During testing, performance remains normal within the limits of technical specifications.
(2) Performance Level B: During testing, function or performance may be temporarily degraded or lost, but it can recover automatically. The actual operating status, stored and other data remain unchanged.
Dimensions
| Flat Flange | Flat Flange |
 |
 |
| Table 4 Level Flange Dimensional Drawing | ||||||||
| Nominal Diameter | Rated Pressure | ΦD | ΦC | Φd1*1 (Insert Type) | Φg | t | Bolts | |
| Qty | Thread | |||||||
| DN 50 (Sealing face DIN 2526 Type E) (Flange DIN 2501) | PN1.6/4MPa | 165 | 125 | 48.3 | 102 | 20 | 4 | M16 |
| PN 6.4MPa | 180 | 135 | 48.3 | 102 | 26 | 4 | M20 | |
| PN 10MPa | 195 | 145 | 48.3 | 102 | 28 | 4 | M20 | |
| DN 80 (Sealing face DIN 2526 Type E)(Flange DIN 2501) | PN1.6/4MPa | 200 | 160 | 76 | 138 | 24 | 8 | M16 |
| PN 6.4MPa | 215 | 170 | 76 | 138 | 28 | 8 | M20 | |
| PN 10MPa | 230 | 180 | 76 | 138 | 32 | 8 | M24 | |
| DN 2" (ANSI B 16.5 RF Type) | 150psi | 152.4 | 120.6 | 48.3 | 92.1 | 17.4 | 4 | M18 |
| 300psi | 165.1 | 127 | 48.3 | 92.1 | 20.6 | 8 | M18 | |
| 600psi | 165.1 | 127 | 48.3 | 92.1 | 31.75 | 8 | M18 | |
| DN 3" (ANSI B 16.5 RF Type) | 150psi | 190.5 | 152.4 | 76 | 127 | 22.2 | 4 | M16 |
| 300psi | 209.5 | 168.3 | 76 | 127 | 27 | 8 | M20 | |
| 600psi | 209.5 | 168.3 | 76 | 127 | 38.05 | 8 | M20 | |
| DN 4" (ANSI B 16.5 RF Type) | 150psi | 229 | 191 | 89 | 157 | 30 | 8 | M18 |
| 300psi | 255 | 200 | 89 | 157 | 32 | 8 | M18 | |
Note: Users can optionally install bolts and nuts.
Electrical Connections
| Figure 5: Electrical Connection Diagram |
 |
Note: The quick interface function is equivalent to the signal terminal.
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