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AST4520 Level Transmitter
Brand: American Sensor Technologies IncThe AST4520 Flush Submersible liquid level sensor is the cost effective solution for level monitoring of turbulent tanks with viscous media.
Approved to UL/cUL913 Class 1 Division 1 IS, Groups C and D with an approved barrier, the product ensures a safe, reliable source for level measurement. The AST4520 is also certified to ATEX / IECEx Class I Zone 0 Exia IIB T4 Ga (Temperature = -40°C to 80°C).
The AST4520 is offered with pressure ranges from 0 to 15 psig. The AST4520 steel cage front end design allows for proper flow of liquids while keeping the sensor at the bottom of the tank or well. With an engraved stainless steel housing and Kynar PVDF cable, this sensor is built to handle the toughest environments.
Features- Engraved Housing
- Protective Steel Cage Assembly
- Kynar PVDF Cable
- Compatible with Wide Variety of Chemicals
- Ruggedly Designed for Harsh Waste Water Environments
- Suitable for Waste, Salt, Brackish, or Fresh Water Systems
- EMI/RFI and Reverse Polarity Protection
- Lightning and Surge Protection
- Competitively Priced for OEM Applications
- ABS (American Bureau of Shipping) Approved
Specifications
Accuracy
- < ± 0.25 % BFSL at 25° C (77° F)
Ambient Temperature Range
- -40° to 80° C (-40° to 176° F)
Applications
- Food Tanks
- Heavy Oil
- Industrial Applications
- Lift Stations
- Storm Water
- Viscous Media Tanks
- Wastewater
Approvals & Certifications
- ABS
- ATEX: Class I Zone 0 Exia IIB, IIC T4 Ga, Temperature = -40° to 80° C (-40° to 176° F)
- CSA 157 Class I, Div. 1, Groups C, D Intrinsically Safe, ANSI/ISA 12.27.01 Single Seal
- IECEx: Class I Zone 0 Exia IIB, IIC T4 Ga, Temperature = -40° to 80° C (-40° to 176° F)
- UL/cUL 913 Class I, Div. 1, IS, Groups C, D
Bandwidth
- (-3 dB), DC to 1 kHz at 1-5 Vdc Output
- (-3 dB), DC to 250 Hz at 4-20 mA Output
BSP Connection
- G 1/2 with Steel Cage, Flush Diaphragm without Steel Cage
Burst Pressure
- 5 times or psi: 1,250 (kPa: 8,618, bar: 86.18) whichever is less at 25° C (77° F)
Cable Length
- 25 feet (7.62 metres)
- 50 feet (15.2 metres)
- 75 feet (22.86 metres)
Cable Material
- Kynar PVDF Cable
Compensated Temperature
- 0° to 55° C (32° to 131° F)
Current
- < 10 mA at 1-5 Vdc Output - Current Consumption
- 20 mA, Typical at 4-20 mA Output - Current Consumption
Diaphragm Material
- Flush
Enclosure, Body Material
- Stainless Steel
Environmental Protection
- Intrinsically Safe
- IP68
Excitation Voltage
- 10-28 Vdc
Humidity
- 0 to 100 % Relative Humidity, Non-Condensing
Media
- Chemicals
- Liquids
- Oil
- Water
Operating Temperature
- -40° to 80° C (-40° to 176° F)
Output
- 1-5 Vdc
- 4-20 mA
Output Impedence
- 10 Kilohms at 4-20 mA Ouput
Output Load
- 0 to 800 ohms at 10-28 Vdc at 4-20 mA
- 10,000 ohms, Min. at 1-5 Vdc
Output Noise
- < 2 mV RMS at 1-5 Vdc Output
Pressure Cycles
- > 50 Million at 25° C (77° F)
Pressure Range
- bar: 0 to 1.034
- Feet WC: 5.77 to 34.60
- kPa: 0 to 103.4
- psi: 0 to 15
Reverse Polarity Protection
- Yes
RFI/EMI Protection
- Yes
Shock
- 100 G, 11 milliseconds, 1/2 Sine
Span Effect
- < ± 1.5 % of Full Scale at 1-5 Vdc - Span Tolerance
- < ± 2 % of Full Scale at 4-20 mA Output - Span Tolerance
Stability
- ± 0.25 % of Full Scale Per Year Typically at 25° C (77° F)
Storage Temperature
- -40° to 100° C (-40° to 212° F)
Vibration
- 10 G Peak, 20 to 2,000 Hz
Wetted Materials
- 304 Stainless Steel Housing
- 316L Stainless Steel Sensor
- Kynar Cable
Zero Offset
- < ± 1 % of Full Scale