I. Overview
The AO3051LT level transmitter is a field transmitter that is directly mounted on pipes or containers. Due to the diaphragm's direct contact with the liquid phase medium, there is no need to route the positive pressure side out through a pressure gauge tube, allowing for the measurement of liquid levels, pressure, and density of media with high temperatures, high viscosity, tendency to crystallize, settle, and strong corrosiveness, which are then converted into a 4-20mA signal output. The AO3051LT level transmitter is installed using standard flanges, offering both flat and insert flanges for user selection. The installation flange standards are ANSI 3 inches and 4 inches, with specifications including 150LB and 300LB flanges. The diaphragm materials include 316L, Hastelloy, Monel, and Tantalum. The AO3051LT level transmitter features a compact, miniature diaphragm capacitor sensor, with a variety of types and specifications for easy installation and use. To accommodate the domestic automation level, this series offers two types of products: a standard analog output model and an intelligent model with HART fieldbus protocol.
II. Features
High precision; Good stability.
Solid components, socket-type printed circuit boards; small, lightweight, and rugged vibration-resistant.
Range, external zero point continuously adjustable; damping adjustable.
Excellent one-way overload protection; No mechanical moving parts, maintenance workload for 24-hour operation;
The material for the diaphragm in contact with the medium can be selected; diaphragms are available in corrosion-resistant materials such as 316L, TAN, HAS-C, MONEL, etc.
Smart HART Fieldbus Protocol.
III. Technical Specifications
1. Technical Specifications | |||
End User | Liquid | ||
Measurement Range | 0 to 1 KPa to 0 to 7000 KPa | ||
Output | 4-20mA DC, Smart HART fieldbus protocol signal output. | ||
Power Supply | 24V DC, operates at 12V DC (with LCD display below 15VDC), high up to 45VDC. | ||
Load Characteristics | |||
Positive and Negative Transfer | Regardless of the output, after positive and negative shifts, the upper and lower limits of the range must not exceed the range limits. 0-100% base range | ||
Temperature Range | -40℃～+85℃ Operating temperature of the filled silicone oil measuring element (medium temperature): -40℃ to +149℃ | ||
Humidity Range | Relative humidity: 1~100% | ||
Sensor Volume Change | Less than 0.16 cm³ | ||
Instruction Sheet | Digital Display | ||
Explosion-proof type | Intrinsically Safe Exd II CT6; Intrinsically Safe Exib II CT6 | ||
Range and Zero Point | You can change by clicking on the table headers. | ||
Overpressure Limit | Application for ranges below 6 MPa: 0 (absolute pressure) to 14 MPa. | ||
Damping | Continuous adjustable between 0 to 32 seconds. | ||
Launch Date | 2 seconds, no need for preheating. | ||
2. Performance Specifications | |||
Integrated accuracy | Adjustable range ±0.1%, ±0.2% (Standard accuracy is ±0.1%, please specify any other accuracy during order selection.) | ||
Stability | No more than the transmitter accuracy within six months | ||
Temperature Impact: At wide range (-10℃-60℃), every 30℃ change (for intelligent models*) | Range Code or Name | Accuracy Grade | |
0.1 Grade | 0.2 grade | ||
3 | / | ≤±0.30% | |
4、5、6 | ≤±0.10% | ≤±0.20% | |
Remote Transmission, Level | / | / | |
Static Pressure Effect | Range Code or Name | Accuracy Grade | |
0.1 grade | 0.20 grade | ||
3 | / | 0.50% | |
4、5、6 | 0.10% | 0.30% | |
Vibration Impact | On any axis, at a frequency of 200Hz, the error caused is ±0.05%/g over a wide range, and for range code 2 (differential pressure), it is ±0.25%/g. | ||
Power Impacts | Less than 0.005%/V of the output range. | ||
Load Impact | Power is stable with no load effect. | ||
Installation location affects | The instrument can have a zero-point error of up to 0.24 KPa, but it is adjustable and does not affect the range. | ||
3. Structural Indicators | |||
Structural materials | Isolation Membranes: 316 Stainless Steel, Hastelloy C, Inconel, Tantalum. O-ring (medium contact point): Fluororubber. Flanges and Bolts: 316 Stainless Steel. Filling Liquid: Silicone oil or inert oil. Electrical Enclosure: Low copper aluminum alloy. Bolts: Chrome-plated carbon steel | ||
Pressure fitting | The connection bolt holes on the pressure vessel are 1/4 NPT, the connection bolt holes on the pressure gauge接头 are 1/2 NPT, the center distance can be seen in the dimensions of various models, and the signal cable connection bolt holes are M20×1.5. | ||
Shell Protection Grade | IP65 | ||
Weight | 3.9 kg (excluding options, excluding flanged transmitters) | ||
-30℃ to -10℃; temperature drift of 1.5 times the listed value for 60℃ to 85℃; non-intelligent type temperature drift is 3 times that of the intelligent type.
Structural dimensions
Section 4: AO3051LT Series Dimensional Drawing
