AST AST4520 Datasheet User Manual

Flush diaphragm submersible liquid level sensor, Ast4520 environmental data, Performance @ 25°c (77°f)

American Sensor Technologies

•

450 Clark Dr., Mt. Olive, NJ 07828

•

phone (973) 448-1901

•

fax (973) 448-1905

•

email: [email protected]

Flush Diaphragm Submersible Liquid Level Sensor

AST4520

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

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

Applications

Lift Stations -

Wastewater, Storm Water,

Industrial Applications

Food Tanks

Viscous Media Tanks

Heavy Oil

Benefits

Engraved 316L 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

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 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 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.

Electrical Data

Output

4-20mA

1-5VDC

Excitation

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

Span Tolerance:

<±2% of FS

<±1.5% of FS

Output Load:

0-800 Ohms@10-28VDC

10k Ohms, min

Reverse Polarity Protection

Yes

For UL certified barrier

drawing, see A01657.

For CSA certified barrier

drawing, see A08949.