AST AST20SW Datasheet

TM

Stainless Steel SPDT Pressure Switch

AST20SW

The Model 20SW is a high accuracy Industrial ASIC Pressure Switch,
designed for use in a variety of applications. Applying digital compensation,
this product offers top performance over a wide temperature range. Utilizing
Krystal Bond Technology™, the sensing element will measure pressure in the
most extreme temperature conditions. Where other sensor technologies will
freeze or boil, the
AST20SW uses a one piece stainless steel sensor to offer continuous
operation. If linearity and repeatability are critical for your application, this
product will exceed your expectations at an affordable price.

Environmental Data

Temperature

Operating -40 to 85°C (-40 to 185°F)

Storage -50 to 105°C (-58 to 221°F)

Thermal Limits

Compensated Range -20 to 70°C ( -4 to 158°F)

Other

Shock 100G, 11 msec, 1/2 sine

Vibration 10G peak, 20 to 2000Hz

EMI/RFI Protection: Yes

Rating: IP-66

Benefits

ASIC Compensation 

Superb Temperature Performance 

Wide Operating Temperature Range 

Excellent Accuracy 

Applications

Hydraulics Controls 

Boilers 

Marine 

Railways 

High Proof and Burst Pressure 

Factory Sealed 

Performance @ 25°C (77°F)

Error Tolerance <±1.0% BFSL of line pressure

Over range Protection 2X rated line pressure, standard*

Burst Pressure 5X or 60,000PSI of line pressure, whichever is less

Pressure Cycles > 100 million full pressure cycle

*For higher proof pressures, contact factory

Electrical Data

Excitation 10-28VDC

Current Consumption < 10mA

Set Point See Chart

Output Load 1 Amp., Resistive

Reverse Polarity Protection

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

Yes

TM

Ordering Information*

Ordering Information

AST20SW A 00025

Series Type

Process Connection*

A= 1/4” NPT Male
B= 1/8” NPT Male
C= 1/4” BSPP Male
W= F250C Female Autoclave

System Pressure

Insert 2 digit code (chart 1)

Pressure Unit

P= PSI

Switch Congurations

E= SPDT [Form C]

Electrical

Y= M12x1

Wetted Material**
0=17-4PH 1=316 L 2= Inconel 718

Pressure Reference

Number (0, 1, 2)= Sealed Gauge
G= Gauge Pressure

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

P Y05

E

1 G F 05

000

Switching Point Pressure

Insert 5 digit code (chart2) (5-95% of system line pressure)

Switching Direction

F= Falling R= Rising

Hystersis

Insert 2 digit code (example: 1% is 01) [1% minimum of line pressure]

Options

No Options= 000

Pressure Ranges

Chart 1

50

100 02

+

250 03

500 04

1000 05

3000 06

5000 07

7500 08

10,000 09

System Pressure

15,000 10

20,000 11

+For ranges not shown, please consult factory

01

Code

*For optional pressure ports and electrical interfaces please consult factory.
1/8” NPT Male not available under 50PSI or with 316L.
F250C Female Autoclave is the only option for 10,000 to 20,000PSI, not available in 316L.
**316L available up to 10,000 PSI. For Inconel 718 consult factory on availability.

+

Chart 2

25

50 00050

+

100 00100

250 00250

500 00500

1,000 01000

2,500 02500

Switching Pressure

5,000 05000

10,000 10000

00025

Code

www.astsensors.com

© 2014 American Sensor Technologies Inc. AST20SW 03/13/2014.

All specications subject to change without notice.