AST AST5100 Datasheet

TM

Low Pressure Differential Transmitter

AST5100

The AST5100 Wet - Wet Differential Pressure transmitter is your accurate pressure
sensing device for low differential pressure. With a differential pressure range as

low as 0 to 5” water column (12.5mbar), this product can be used to measure ow
across an orice, differential across a lter, tank level, or gauge pressure. Using

LVDT technology and AST’s advanced electronics, the AST5100 delivers accurate,
repeatable measurements.

Applications

Liquid Level Control including Bubbler 

systems

Climate Control



Energy Management 
Air-fuel Ratio including Measurement for 

Furnaces

Benefits

Accurate Low Pressure Measurement 

Excellent Repeatability 

Wide Range of Liquids and Gases  including: Water, Natural Gas,

Hydrocarbon Fuels, Air and Non-Corrosive Gases

Vapor Recovery



Leak Detection 
Air or liquid Filtration 
Flow Measurement 

Wetted Materials

Nickel Alloy 52, Ni-Span C, Viton, 304 Stainless Steel, 

Aluminum 6061, RoHS Solder, Loctite 680 (meets NSF61)

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

Electrical Data

Output

Excitation 10-28VDC 10-28VDC

Output Change with Input Voltage Change

Current Consumption: - < 10mA

Bandwidth 5Hz 5Hz

Output Noise: < 0.0035mA, RMS < 1mV, RMS

Zero Offset: < ± 1% FS < ± 1% FS

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

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

Reverse Polarity Yes Yes

Installation Guidelines

The AST5100 must be mounted on a at surface within ± 15° to the ideal 0° plane to
maintain specications. Do not Overtighten the pressure connections or insert any ob-

jects in P1 or P2 to avoid damaging the sensing element. When using isolation valves,
both should be mounted close to the sensor. For liquid level and wet applications,
install bleed screw adapters close to P1 and P2 so that trapped air can be purged if
needed. For optimum performance, always make sure pressure is equalized within the
pressure range chart ranges. The AST5100 has asymmetric protection on P1 and P2.

Performance @ 25°C (77°F)

Accuracy <±1.0% of FS

Stability (1 year) ±0.5%FS, typ

Burst Pressure 2000 PSI

Pressure Cycles >100,000 Cycles

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

4-20mA 0-5V Three Wire

- <0.1% from 10 to 32 VDC

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

TM

Ordering Information

4

E

Series Type

Process Connection

J= 1/8” NPT Female

Pressure Range

See Chart

Pressure Unit

H= Inches H2O P= PSI

Outputs

2= 0-5V 3-wire 4 = 4 - 2 0 m A ( 2 w i r e l o o p p o w e r e d )

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

Y= M12x1

Wetted Material

5= Nickel Alloy 52, Ni-Span C, Viton, 304 Stainless Steel, Aluminum 6061, RoHSSolder, Loctite 680 (meets NSF61)

Options

000= No Options

Mating PUR 22 AWG Cable Assembly

Part Number Cable Length

A10089 4 feet (1 m)

A10090 10 feet (3 m)

Pins

Pin 1 Brown +V +V

Pin 2 White N/C N/C

Pin 3 Blue -V -V

Pin 4 Black V Out N/C

Conductor

Colors

0-5V

3-wire

4-20mA

The over-pre ssure specication is the maximum pressure the AST5100 can

see without damage. Any pressure appli ed over the listed numb ers will likely

damage the s ensor and will, at minimum, cause a permanent zero shift.

Over-pressur e between 2X span and the numbers listed applied to port P1

will likely cause no permanent harm. Over-pressure of between 2X span and

the numbers listed applied to port P2 may cause a temporary zero shift. To

recover from a zero shift caused by negative over-pressure to P2 within the

listed limits, apply a positive over-pressure P1 to just under the listed limit

for a durati on of 5 minutes. Remove the over-pressure and check the zero

with no pres sure applied. If the zero has not recovered, repeat the positive

over-pressur e and recheck zero. If it has not recovered after the second try,

the zero has been permanently shifted. Contact the factory.

5YH00050JAST5100

000

Pressure Ranges

Differential

Pressure

0-5 inch H

0-10 inch H2O (25 mbar) 00010H 5 PSI 3 PSI

0-20 inch H2O (50 mbar) 00020H 8 PSI 5 PSI

0-50 inch H2O (125.5 mbar) 00050H 15 PSI 10 PSI

0-100 inch H2O (249 mbar) 00100H 35 PSI 25 PSI

0-200 inch H2O (498 mbar) 00200H 35 PSI 25 PSI

0-15 PSID (1034 mbar) 00015P 75 PSI 50 PSI

O (12.5 mbar) 00005H 5 PSI 3 PSI

2

Pressure

Code

Proof

Pressure

(P1>P2)

Pressure

(P2>P1)

www.astsensors.com

Proof

Dimensional Data

© 2014 American Sensor Technologies Inc. AST5100 03/13/2014.

All specications subject to change without notice.