AST AST4520 Datasheet

Flush Diaphragm Submersible Liquid Level Sensor

AST4520

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 certied to ATEX Class I Zone 0 Exia IIB T4 Ga (Ta = -40°C to +80°C).

The AST4520 is offered with pressure ranges from 0-2.5 to 0-15 PSIG. The

AST4520 steel cage front end design allows for proper ow 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.

Benefits

Applications

Environmental Data

Temperature

Operating -40 to 80°C (-40 to 176°F)

Storage -40 to 100°C (-40 to 212°F)

Thermal Limits

Compensated Range 0 to 55°C (32 to 131°F)

TC Zero <±1.5% of FS

TC Span <±1.5% of FS

Other

Shock 100G, 11 msec, 1/2 sine

Vibration 10G peak, 20 to 2000 Hz.

EMI/RFI Protection: Yes

Rating: IP-68

Engraved 316L Housing 

Protective Steel Cage Assembly 

Kynar PVDF Cable 

Compatible with Wide Variety of Chemicals 

Ruggedly Designed for Harsh Waste Water 

Environments

Lift Stations -  Wastewater, Storm Water, Industrial Applications

Food Tanks 

Viscous Media Tanks 

Heavy Oil 

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

For UL certied barrier

drawing, see A01657.

For CSA certied barrier

drawing, see A08949.

Performance @ 25°C (77°F)

Accuracy* < ±0.25% BFSL

Stability (1 year) ±0.25% FS, typical

Over Range Protection 2X Rated Pressure

Burst Pressure 5X or 1,250 PSI (whichever is less)

Pressure Cycles > 50 Million

Electrical Data

Output 4-20mA 1-5VDC

Excitation 10-28VDC 10-28VDC

Output Impedance >10k Ohms <100 Ohms, Nominal

Current Consumption: 20mA, typical <10mA

Bandwidth (-3dB): DC to 250 Hz (-3dB): DC to 1kHz

Output Noise: - <2mV RMS

Zero Offset: <±1% of FS <±1% of FS

Span Tolerance: <±2% of FS <±1.5% of FS

Output Load: 0-800 Ohms@10-28VDC 10k Ohms, min

Reverse Polarity Protection Yes Yes

American Sensor Technologies • 450 Clark Dr., Mt. Olive, NJ 07828 • phone (973) 448-1901 • fax (973) 448-1905 • email: info@astsensors.com

Ordering Information

AST4520 Y 00005 P

Series Type

Process Connection

Y= G1/2 with steel cage T= G1/2 ush diaphragm without steel cage

Pressure Range

Insert 5-digit pressure code

Pressure Unit

H= Inches H2O P= PSI

Outputs

3= 1-5V 4= 4-20mA (2 wire loop powered)

Electrical

X= Optional Length (see options)

Wetted Material

1 = 316L Sensor / 304 SS Housing / Kynar Cable

4 1

353

-SS

Options Cable Lengths:

353 = 25 ft. (7.62 m) 354 = 50 ft. (15.24 m) 355 = 75 ft. (22.86 m)

Approval

(Left Blank)= UL ANSI/ISA 12.12.01 Class I Div 1 Intrinsically Safe Groups C, D (formerly UL913)

-SS= Add “-SS” for CSA157 Class I Div 1 Groups C, D Intrinsically Safe and ANSI/ISA 12.27.01 Single Seal Approval and SIRA ATEX Exia IIB

Class I, Zone 0, T4

Note: CSA approved products require case/earth ground electrical connection. See wiring installation sheet for further details

Pressure Ranges

Gauge PSIG Pressure Code

0-15 00015 34.60

0-10 00010 23.07

AST4520

0-7.5* 00208* 17.30

0-5 00005 11.53

0-2.5* 00069* 5.77

*2.5 and 7.5 PSI Sensor must be ordered in inches of H2O.

Feet of Water Column

@ 4ºC (approx.)

www.astsensors.com

All specications subject to change without notice.

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