Ashcroft® Miniature Pressure Switches Page: SW/PI-77

PRODUCT INFORMATION

CONVERTING OLD A-SERIES PART NUMBERS TO THE

NEW A-SERIES PART NUMBERS

With the release of the New A-series product family, Ashcroft will be discontinuing the old A-series
product family and part numbers. This guide is intended to easily convert the old part numbers to the
new part numbers. The new A-series has more configurations and ranges available than the old A-
series. There now may be more than one possible conversion or there is a feature that could be added
to make the switch better for its intended application. It is best practice to break down the old part
number to its specifications and then build a new part number based on the application requirements.
1. Break down the old part number to its function, enclosure, micro switch, electrical
connection, actuator seal, pressure connection, options and range.
2. Review the application and electrical requirements.
3. Review Old A-series to New A-series conversion table and build a new A-series part
number.

OLD A-SERIES PRODUCT CODING:

Part Number APS NS D L S 02 X6B 30#

1. Function:
2. Enclosure:
3. Micro Switch:
4. Electrical Connection:
4. Actuator Seal:
5. Pressure Connection:
6. Options:
7. Pressure Range:

1. Function:
APS – A-series pressure switch, single setpoint, fixed deadband, factory set only, not field
adjustable
APA – A-series pressure switch, single setpoint, fixed deadband, field adjustable

2. Enclosure:
RB – Watertight Brass body with polycarbonate switch seal
RS – Watertight 304 Stainless Steel Body with polycarbonate switch seal
NS – Watertight 304 Stainless Steel Body with glass to metal switch seal
N7 – Explosion Proof 304 Stainless Steel Body with glass to metal switch seal

© Ashcroft Inc. 02/2012 SW/PI-77 Page 1

 3. Micro Switch:
D – General Purpose 5A @ 125/250 VAC, 5A @ 28 VDC resistive, 3A @ 28 VDC inductive
M – Gold Contacts 1A @125 VAC, 1A @ 28 VDC resistive, 0.5A @ 28 VDC inductive

4. Electrical Connection:
L – Wire leads, 3-18 AWG PVC insulated wires 12” length
S – Screw terminals, 3 - #6 binding head screws
T – Spade terminals, 3 - 0.187” male spade
C – ½” NPT male conduit connection with 3-18 AWG PVC insulated wires 12” length
H – Micro DIN Connector – Watertight DIN 43650 cable socket

5. Actuator Seal:
B – Buna Diaphragm and O-ring
V – Viton Diaphragm and O-ring
T – Teflon Diaphragm and O-ring
S – 316 Stainless steel welded Diaphragm
H – 304 Stainless steel piston with Viton O-ring

6. Pressure Connection:
01 – 1⁄8” NPT Male
02 – ¼” NPT Male
03 – 1⁄8” NPT Female
04 – ¼” NPT Female
05 – 7⁄16-20 SAE Male
06 – VCR – Fixed
07 – VCO – Fixed
09 – 0.75” Tri-clamp connection

7. Options:
XC4 – Individual certified calibration chart
XFS – Factory Set (APA models only)
XFP – Fungus proofing
XLE – Long Leads – 6’ standard, other lengths can be called out
XMD– Metric range on Label
XMQ– Positive Material Identification
XNC – 2 wire leads - wired for normally closed operation
XNO – 2 wire leads - wired for normally open operation
XNH – Stainless Steel Tag
XNN – Paper Tag
X3A – 3A approval for 1.5” or 2.0” Tri-clover connection
X6B – Cleaned for Oxygen service

Notes:
The X character will only appear before the first option, additional options will just be the two
characters. Example: XFSLENH. If the switch is mounted to a seal the seal fill fluid is also listed
as an X option.

© Ashcroft Inc. 02/2012 SW/PI-77 Page 2

 8. Pressure Range:
–30 IMV (Brass body only)
–30 IMV/15# (Stainless steel body only)
15# (Brass body only)
30#
60#
100#
200#
400#
600#
1000#
2000#

NEW A-SERIES PRODUCT CODING:

-
Part Number APS N4 1H 012L S 02 30# - 15 R –X6B
1. Function:
2. Enclosure:
3. Micro Switch:
4. Electrical Connection:
5. Actuator Seal:
6. Pressure Connection:
7. Pressure Range:
8. Setpoint:
9. Setpoint Direction:
10. Options:

1. Function:
APS – A-series pressure switch, single setpoint, fixed deadband, factory set only, not field
adjustable
APA – A-series pressure switch, single setpoint, fixed deadband, field adjustable
2. Enclosure:
N4 – Watertight 316 Stainless Steel Body
N7 – Explosion Proof 316 Stainless Steel Body, (requires electrical connection C)

© Ashcroft Inc. 02/2012 SW/PI-77 Page 3

 3. Micro Switch:
First Character:
1 – Single switch – SPDT
2 – Dual switch - DPDT
Second Character:
G – Gold Contact – 0.1 A @ 125 VAC. 0.1 A @ 30 VDC
H – Higher Current - 5A @ 125/250 VAC, 5A @ 28 VDC resistive, 3A @ 28 VDC inductive
L – Higher Current Gold Contacts - 1A @125 VAC, 1A @ 28 VDC resistive, 0.5A @ 28 VDC
Inductive
P – General Purpose – 3A @ 125 VAC, 2A @30 VDC

4. Electrical Connection:
012C – ½˝ NPT male conduit connection with 3-18 AWG PVC insulated wires 12” length
000H – Micro DIN Connector – Watertight DIN 43650 cable socket without mating connector.
00MH– Micro DIN Connector – Watertight DIN 43650 cable socket with mating connector.
012L – Wire leads, 3-18 AWG PVC insulated wires 12” length
000N – Nonstandard, customer specified see # Variation
000T – Spade terminals, 4 - 0.187˝ male spade
Note: The three numeric digits represent the length of wire in inches

5. Actuator Seal:
B – 316 Stainless Steel piston and Buna O-ring
V – 316 Stainless Steel piston and Viton O-ring
S – 316 Stainless steel welded Diaphragm

6 Pressure Connection:
01 – 1⁄8” NPT Male
02 – ¼” NPT Male
03 – 1⁄8” NPT Female
25 – ¼” NPT Female
05 – 7⁄16-20 SAE Male
06 – VCR – Fixed
07 – VCO – Fixed
75 – 0.75” Tri-clamp connection (includes 3A Approval)
15 – 1.5” Tri-clover connection (includes 3A Approval)
20 – 2.0” Tri-clover connection (includes 3A Approval)

7. Pressure Range:
Actuator PSI Bar kPa Kg/cm2
S –15/15# –1/1BR –100/100KP –1/1KSC
S 30# 2BR 200KP 2KSC
S 60# 4BR 400KP 4KSC
S 100# 7BR 700KP 7KSC
B, S, V 200# 14BR 1400KP 14KSC
B, V 500# 35BR 3500KP 35KSC
B, V 1000# 70BR 7000KP 70KSC
B, V 2000# 140BR 14000KP 140KSC
B, V 5000# 350BR 35000KP 350KSC
B, V 7500# 500BR 50000KP 500KSC

© Ashcroft Inc. 02/2012 SW/PI-77 Page 4

 8. Setpoint:
5 characters maximum representing setpoint of the switch in the same units as the range of
the switch. For setpoints in Vacuum specify as “– “pressure.

9. Setpoint Direction:
R – Rising Pressure (Increasing Pressure)
D – Decreasing Pressure
Note: If no setpoint is required on an APA switch use either “NSR” or “NSD.” If direction is
not known use “NSR” as the default.

10. Options:
XC4 – Individual certified calibration chart
XBP – Mounting Bracket
XFP – Fungus proofing
XMQ – Positive Material Identification (75, 15 & 20 process connections only)
XNC – 2 wire leads – wired for normally closed operation
XNO – 2 wire leads – wired for normally open operation
XNH – Stainless Steel Tag
XNN – Paper Tag
X6B – Cleaned for Oxygen service

Notes:
The X character will only appear before the first option, additional options will just be the
two characters. Example: XFSLENH. If the switch is mounted to a diaphragm seal the seal
fill fluid is also listed as an X option.

© Ashcroft Inc. 02/2012 SW/PI-77 Page 5

 OLD A-SERIES TO NEW A-SERIES CONVERSION TABLE
Old A-series New A-series Comments
Function APA APA
APS APS
Enclosure RB N4
RS N4
NS N4
N7 N7
Switch D 1H or 1P Check electrical requirement
M 1L or 1G Check electrical requirement
Electrical L 012L
Connection T 000T
C 012C
H 00MH
S No longer available
Actuator B S Range ≤100#
Seal B B Range ≥200#
V S Range ≤100#
V V Range ≥200#
T S Range ≤100#
T B or V Range ≥200#, check media compatability
S S Range ≤200#
S B or V Range ≥200#, check media compatability
H V
Process 01 01
Connection 02 02
03 03
04 25
05 05
06 06
07 07
09 75
Range 30IMV –15/15#
30IMV/15# –15/15#
15# –15/15#
30# 30#
60# 60#
100# 100#
200# 200#
400# 500#
600# 500# or 1000# Depending setpoint
1000# 1000#
2000# 2000#
Options C4 C4
FS Add setpoint to part number
FP FP
LE Add long length to Electrical Connection (Ex. 072L)
MD Not required order in Metric Range
MQ MQ
NC NC
NO NO
NH NH
NN NN
3A Not required order 75, 15, or 20 connection
© Ashcroft Inc. 02/2012 SW/PI-77 Page 6
Examples of Old Part numbers converted to new part numbers

Old A-series Part Number New A-series Part Number

APSRBDLB0215# APSN41HLS02-15/15#-5R or APSN41P012LS02-15/15#-5R
Set at 5 PSI Increasing
APARBMTT01XFS200# APAN41L000TS01200#-80D or APAN41G000TS01200#-80D
Set at 80 PSI Decreasing
APSRSDHS04100# APAN41H000HS25100#-75R or APAN41P000HS25100#-75R
Set at 75 PSI Increasing
APANSMLH05XFS6B1000# APAN41L012LV051000#-675D-X6B or
Set at 675 Decreasingr APAN41G012LV051000#-675D-X6B
APSN7DCS09XMQ60# APSN71H012CS7560#-40R-XMQ or
Set at 40 PSI Increasing APSN71P012CS7560#-40R-XMQ
APAN7MCH021000# APAN71L012CV021000#-NSR or APAN71G012CV021000#-NSR

Notes:
1. Selection of the Micro switch should be based on the electrical requirements of the
application. If they are not known use the H micro switch in place of a D micro switch or an
L micro switch in place of a M micro switch.

2. Always verify the compatibility of the actuator seal material and the application media.

3. The electrical connection “S” screw terminal has been discontinued. Choose one of the other
electrical connection choices. The micro DIN connector does have screw terminals for wire
termination inside of the connector plug housing.

4. Make sure the setpoint is called out in the part number if using an APS switch.

© Ashcroft Inc. 02/2012 SW/PI-77 Page 7