AST AST45PT Datasheet

TM

Pressure & Temperature Submersible Transmitter

AST45PT

The AST45PT is a combined pressure and temperature transmitter for 

accurate liquid level measurement.

For pressure ranges from 0-1 to 100 PSI that require a wide range of 

media compatibility, the AST45PT submersible series is an excellent solution

to monitor level and temperature for indoor and outdoor applications.

PRESSURE & TEMPERATURE

Environmental Data

Temperature

Operating -40 to 85°C (-40 to 185°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

Benefits

High Strength Stainless Steel 

Construction

No Internal O-rings 

Wide Operating Temperature 

Pressures up to 100 PSI 

Low Static and Thermal Errors 

Unparalleled Price and Performance 

Rugged Design 

New Conduit Fitting at Electrical 

Applications

Ground Water Level 

Measurement

Earthen & Concrete  Dams

Liquid Tanks 

Irrigation 

Environmental Sites 

Building Automation 

Controls

Waste Water Canals 

Connection

Compatible with Wide Variety of Liquids 

EMI/RFI Protection 

Performance @ 25°C (77°F)

Accuracy (Pressure)* < ±0.25% of FS BFSL

Accuracy (Temp.)* < ±1.0% of FS BFSL

Over Range Protection 2X Rated Pressure

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

Pressure Cycles > 50 Million

* Accuracy includes non-linearity, hysteresis & non-repeatability

Electrical Data

Output 4-20mA

Excitation 10-28VDC 10-28VDC

Current Consumption: - < 10mA

Sampling Rate 400Hz 400Hz

Output Noise: < 1mV, RMS < 1mV, RMS

Zero Offset < ± 0.5% FS < ± 0.5% FS

Span Tolerance < ± 0.5% FS < ± 0.5% FS

Output Load: 0-800 Ohms@10-28VDC 5k Ohms, min.

Reverse Polarity Protection Yes Yes

+

For units with loop-powered 4-20mA output, the pressure loop must be powered or the temperature output will not operate.

American Sensor Technologies • 450 Clark Dr., Mt. Olive, NJ 07828 • phone [phone] • fax [phone] • email: [e-mail]

+

1-5V

TM

Ordering Information

AST45PT L 00005

1 1

Series Type

Temperature Output Range

1= -40 to 85°C (-40 to 185°F)
2= -40 to 125°C (-40 to 257°F)
3= 0 to 70°C (32 to 158°F)
4= -55 to 125°C (-67 to 250°F)
5= -18 to 93°C (0-200°F)

Conguration Interface

L= Cone (removable)

Pressure Range

Insert 5-digit pressure code

Pressure Unit

H= Inches H

O P= PSI

2

Outputs

3= 1-5V 4= 4-20mA

Electrical

N= Conduit tting,

Cable 6 ft.

(for wiring information visit: http://www.astsensors.com/wiring.php)

P= Conduit tting,

Cable 10 ft.

X= Optional Length
(see options)

4

X

NP

065

Wetted Material

1= 316L / 304 / Hytrel (cable) / Kynar (cord grip)

Fail Condition

N= Not Specied H= Fail High L= Fail Low

Options Cable Lengths:
140= 15 ft. (4.6 m)
075= 20 ft. (6.1 m)
074= 25 ft. (7.6 m)

AST45PT

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

004= 35 ft. (10.7 m)
130= 40 ft. (12.2 m)
065= 50 ft. (15.2 m)

Gauge PSIG Pressure Code Feet of Water Column @ 4ºC (approx.)

0-100 00100 230.67

0-50 00050 115.33

0-30 00030 69.20

0-20 00020 46.13

0-15 00015 34.60

0-10 00010 23.07

0-7.5* 00208* 17.30

0-5 00005 11.53

0-2.5* 00069* 5.77

0-1 00001 2.31

003= 100 ft. (30.5 m)
050= 150 ft. (45.7 m)

Pressure Ranges

www.astsensors.com

© 2014 American Sensor Technologies Inc. AST45PT 03/13/2014.

All specications subject to change without notice.