AST4520 Level Transmitter

Brand: American Sensor Technologies Inc
AST Level Transmitter, AST4520
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AST4520 Level Transmitter

Brand: American Sensor Technologies Inc
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The 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

Brand

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

Documentation

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