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AST4500/AST4510 Level Transmitter
Brand: American Sensor Technologies IncThe AST4500 and AST4510 submersible liquid level sensors are approved to UL/cUL913 (CSA 157) Class I Div 1, Groups C and D for use in intrinsically safe areas with an approved barrier.
It is also certified for ATEX / IECEx Class I Zone 0 Exia IIB T4 Ga (Ta = -40°C to +80°C). For pressure ranges from 0-1 to 0-100 psi that require a wide range of media compatibility, the submersible series is an excellent solution to level monitoring for indoor and outdoor applications.
The AST4500 and AST4510 level sensors are completely sealed for submersion, yet vented through the cable to correct for barometric pressure changes. The welded housing is tested in-house via a helium leak tester to ensure proper protection.
The conductors of the cable are also isolated from the outside environment to keep the sensor operational for long-term use. With a removable nose cone, the AST4500 and AST4510 series can be also be installed outside of the tank through a 1/4” NPT pipe connection.
In this configuration, the sensor continuously monitors the tank level through a threaded connection outside the tank, yet remains fully submersible for applications with flood prone environments or severe wash-down conditions.
Available with voltage or 4-20 mA output signals, AST can provide a cost effective solution for level monitoring for a variety of applications.
Specifications
Accuracy
- < ± 0.25 % BFSL (< ± 0.5 % BFSL for 0-1 psi) at 25° C (77° F)
Applications
- Ballast Tanks
- Bio-Fuels
- Earthen & Concrete Dams
- Fertilizer Tanks
- Gasoline & Diesel Fuel Tanks
- Ground Water Level
- Irrigation Equipment
- Oil Tanks
- Salt Water Holding Tanks
- Wastewater Canals
Approvals & Certifications
- ATEX: Class I Zone 0 Exia IIB T4 Ga (Ta = -40° to 80° C), Exia IIC Class I, Zone 0, T4
- CSA: 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 T4 Ga (Ta = -40° to 80° C), Exia IIC Class I, Zone 0, T4
- UL: ANSI/ISA 12.12.01 UL ANSI/ISA 12.12.01 Class I, Div. 1, Intrinsically Safe Groups C, D (Formerly UL 913)
Bandwidth
- (-3 dB), DC to 1 kHz
- (-3 dB), DC to 250 Hz
Burst Pressure
- 5 times or psi: 1,250 (kPa: 8,618, bar: 86.18) at 25° C (77° F)
Cable Length
- 15 to 150 feet (4.6 to 45.7 metres)
Compensated Temperature
- 0° to 55° C (32° to 132° F)
Consumption
- < 10 mA
- 20 mA Typical
Electrical Connectors
- Conduit, 10 feet
- Conduit, 6 feet
Environmental Protection
- IP68
Excitation Voltage
- 10-28 Vdc
Humidity
- 0 to 100 % Relative Humidity, Non-Condensing
NPT Connection
- 1/2” NPT Male
- 1/4” NPT Male
Operating Temperature
- -40° to 80° C (-40° to 176° F)
Output
- 1-5 Vdc
- 4-20 mA, 2-Wire Loop Powered
Output Impedence
- 10 Kiloohms
Output Load
- 0 to 800 ohms at 10-28 Vdc
- 10,000 ohms Min.
Output Noise
- < 2 mV RMS
Pressure Cycles
- > 50 Million at 25° C (77° F)
Pressure Range
- bar: 0 to 7
- kPa: 0 to 689.5
- psi: 0 to 100
Pressure Type
- Gauge
Reverse Polarity Protection
- Yes
RFI/EMI Protection
- Yes
Shock
- 100 G, 11 milliseconds, 1/2 Sine
Span & Zero Effect
- < ± 1.5 % of Full Scale (< ± 2.5 %, Typical for 1 psi)
Span Effect
- < ± 2 % of Full Scale (< ± 4 % for 1 psi)
Stability
- ± 0.25 % of Full Scale, Typical 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
- 316L Stainless Steel
- Hytrel
- Kynar
Zero Offset
- < ± 1 % of Full Scale (< ± 4 % for 1 psi)