Signal Conditioner Industry Cross Reference

Replace your old signal conditioners with our lifetime warranty units.
Some competitive models have been discontinued or have extremely long lead times. We can replace them quickly and can often ship the next day!

To ensure compatibility, please specify input, output, alarm specifications (for alarm units), and module power and any additional info from the model you are replacing.
Models with same series numbers (i.e. 4380) should be directly compatible, but please check ranges, wiring, and power.

If you have a competitive model not listed here, we can probably find a compatible replacement. For example some companies may have made a "1040" in the past and it is probably compatible with ours.

Click for API DC Input Alarms Replaces Direct Plug-In? Input Output
API 1000 G Action Instruments AP 1000
Wilkerson Instruments MM 1000
JH Technologies JH1000
Yes DC voltage or current 1 DPDT Alarm Relay
API 1005 G Wilkerson Instruments MM 1005 Yes 4-20 mA 1 DPDT Alarm Relay
API 1020 G Action Instruments AP 1020
Wilkerson Instruments MM 1020
JH Technologies JH1020
Yes DC voltage or current 2 SPDT Alarm Relays
API 1025 G     4-20 mA 2 SPDT Alarm Relays
API 1080 G Action Instruments AP 1080
Wilkerson Instruments FR 1000
Yes DC voltage or current, field selectable 1 DPDT Alarm Relay
APD 1080 Action Instruments AP 1080
Wilkerson Instruments FR 1000
No DC voltage or current, field selectable 1 DPDT Alarm Relay
API 1090 G Action Instruments AP 1090
Wilkerson Instruments FR 1020
JH Technologies JH1090P
Yes DC voltage or current, field selectable 2 SPDT Alarm Relays
APD 1090 Action Instruments Q106
Action Instruments G 108
Wilkerson Instruments FR 1020
No DC voltage or current, field selectable 2 SPDT Alarm Relays
APD 1090 D Action Instruments Q108 No DC voltage or current, field selectable 2 SPDT Alarm Relays
Click for API DC Input Input Replaces Direct Plug-In? Input Output
API 4300 G Action Instruments AP 4300
Wilkerson Instruments MM 4300
JH Technologies JH4010
JH Technologies JH4300
JH Technologies JH4300C
Yes DC voltage or current DC voltage or current
APD 4300 Action Instruments AP 4300
Wilkerson Instruments DM 4300A
Wilkerson Instruments DR 4300
No DC voltage or current DC voltage or current
APD 4300 DF Action Instruments Q403-1 No DC voltage or current DC voltage or current
APD 4300 D DF Action Instruments Q404-1 No DC voltage or current DC voltage or current
API 4310 G Action Instruments AP 4310
Wilkerson Instruments MM 4310
JH Technologies JH4050
JH Technologies JH4310
Yes DC voltage or current, narrow span DC voltage or current
API 4380 G Action Instruments AP 4380
Action Instruments AP 4380-2000
Action Instruments AP 4382
Wilkerson Instruments MM 4380A
JH Technologies JH4380P
Yes DC voltage or current, field selectable DC voltage or current, field selectable
APD 4380 Action Instruments Q406-0000
Action Instruments Q406-0001
Action Instruments G 408
Wilkerson Instruments DM 4380A
Wilkerson Instruments DR 4380A
No DC voltage or current, field selectable DC voltage or current, field selectable
APD 4380 D Action Instruments Q408 No DC voltage or current, field selectable DC voltage or current, field selectable
API 4385 G Action Instruments AP 4382 Yes DC voltage or current, field selectable DC voltage or current, field selectable
APD 2000 Action Instruments AP 4390 No Two DC voltage or current Two DC voltage or current
APD 2000 Action Instruments AP 4391 No Two DC voltage or current Two DC voltage or current
APD 2000 Action Instruments AP 4392 No Two DC voltage or current Two DC voltage or current
APD 4393 Wilkerson Instruments DR 4302 No One DC voltage or current Two DC voltage or current (splitter)
APD HV-DC     DC voltage input, field changeable DC voltage or current, field changeable
Click for API DC Input Math Replaces Direct Plug-In? Input Output
API 4400 G Action Instruments AP 4400
JH Technologies JH4400
JH Technologies JH4400I
Yes DC voltage or current A, B, C, and D
DC voltage or current (A+B+C+D)/4
API 4401 G JH Technologies JH4401
JH Technologies JH4401I
Yes DC voltage or current A, B, and C
DC voltage or current (A+B+C)/3
API 4402 G Action Instruments AP 4402
Wilkerson Instruments MM 4402
JH Technologies JH4402
JH Technologies JH4402I
Yes DC voltage or current A and B
DC voltage or current (A+B)/2
API 4403 G JH Technologies JH4403
JH Technologies JH4403I
Yes DC voltage or current A, B, C, and D
DC voltage or current (A+B+C-D)/3
API 4404 G JH Technologies JH4404
JH Technologies JH4404I
Yes DC voltage or current A, B, C, and D
DC voltage or current (A+B-C-D)/2
API 4405 G JH Technologies JH4405
JH Technologies JH4405I
Yes DC voltage or current A, B, C, and D
DC voltage or current A-B-C-D
API 4406 G JH Technologies JH4406
JH Technologies JH4406I
Yes DC voltage or current A, B, and C
DC voltage or current (A+B-C)/2
API 4407 G JH Technologies JH4407
JH Technologies JH4407I
Yes DC voltage or current A, B, and C
DC voltage or current A-B-C
API 4408 G Action Instruments AP 4408
Wilkerson Instruments MM 4408
JH Technologies JH4408
JH Technologies JH4408I
Yes DC voltage or current A and B
DC voltage or current A-B
Click for API RTD Input
Click for API T/C Input
Replaces Direct Plug-In? Input Output
API 1200 G Action Instruments AP 1200
Wilkerson Instruments MM 1200
JH Technologies JH1200
Yes Thermocouple DPDT Alarm Relay
API 1220 G Action Instruments AP 1220
Wilkerson Instruments MM 1220
JH Technologies JH1220
Yes Thermocouple 2 SPDT Alarm Relays
API 1400 G Action Instruments AP 1400 No RTD DPDT Alarm Relays
Wilkerson Instruments MM 1400
JH Technologies JH1400
Yes
API 1420 G Action Instruments AP 1420 No RTD 2 SPDT Alarm Relays
Wilkerson Instruments MM 1420
JH Technologies JH1420
Yes
API 4001 G L Action Instruments AP 4001
Wilkerson Instruments MM 4001
JH Technologies JH4001
JH Technologies JH4001I
Yes RTD DC voltage or current
API 4100 G Action Instruments AP 4130
Wilkerson Instruments MM 4130
JH Technologies JH4100
Yes Thermocouple DC voltage or current
API 4130 G L Action Instruments AP 4130
Wilkerson Instruments MM 4130
Wilkerson Instruments MM 4130L
JH Technologies JH4130
Yes Thermocouple DC voltage or current
V 624 Action Instruments AP 4351 (T/C)
Action Instruments AP 4151 (RTD)
Action Instruments Q486
No Thermocouple or RTD Current or voltage (separate V 624 models)
Click for API Frequency I/O Replaces Direct Plug-In? Input Output
API 1700 G Action Instruments AP 1700
Wilkerson Instruments MM 1700
JH Technologies JH1700
Yes Frequency DPDT Alarm Relay
API 7010 G Action Instruments AP 7010
Wilkerson Instruments MM 7010
JH Technologies JH7010
JH Technologies JH7010I
Yes Frequency DC voltage or current
API 7580 G Action Instruments AP 7380
Yes Frequency, field selectable DC voltage or current, field selectable
API 7500 G     DC voltage or current Frequency, field selectable
API 7500 G M02 Action Instruments AP 7500 Yes DC voltage or current Frequency, field selectable
API 7500 G SS     DC voltage or current Frequency, field selectable
API 7500 G SS M02     DC voltage or current Frequency, field selectable
Click for API AC Input Replaces Direct Plug-In? Input Output
API 1600 G Action Instruments AP 1600
Wilkerson Instruments MM 1600
JH Technologies JH1600
Yes AC voltage or current DPDT Alarm Relay
API 1620 G Action Instruments AP 1620
Wilkerson Instruments MM 1620
JH Technologies JH1620
Yes AC voltage or current 2 SPDT Alarm Relays
API 6010 G Action Instruments AP 6010
Wilkerson Instruments MM 6010
JH Technologies JH6010I
JH Technologies JH6020I
Yes AC voltage or current DC voltage or current
API 6380 G Action Instruments AP 6380 Yes AC voltage or current, field selectable DC voltage or current, field selectable
Click for API Potentiometer Input Replaces Direct Plug-In? Input Output
API 4003 G I Action Instruments AP 4003
Wilkerson Instruments MM 4003
JH Technologies JH4003
JH Technologies JH4003I
Yes Any 0-100 Ω to 0-1 MΩ pot. DC voltage or current
API 4008 G     Any 0-100 Ω to 0-1 MΩ pot. DC voltage or current, field selectable
Click for API Strain Gauge Input Replaces Direct Plug-In? Input Output
API 4051 G Action Instruments AP 4051
Action Instruments AP 4251
Wilkerson Instruments MM 4051
JH Technologies JH4051
Yes Strain Gauge, Load Cell, Bridge DC voltage or current
API 4058 G JH Technologies JH4051I Yes Strain Gauge, Load Cell, Bridge, field selectable DC voltage or current, field selectable
API 4059 G Action Instruments AP 4081 Yes Strain Gauge, Load Cell, Bridge, field selectable DC voltage or current, field selectable
APD 4059 Wilkerson Instruments MM 4051 No Strain Gauge, Load Cell, Bridge, field selectable DC voltage or current, field selectable
APD 4059 D Action Instruments G448 No Strain Gauge, Load Cell, Bridge, field selectable DC voltage or current, field selectable
Click to go to
Valve Position
Replaces Direct Plug-In? Input Output
API 3200 G Action Instruments AP 3200
Wilkerson Instruments MM 3200
Yes Control input: DC volts or current
Feedback potentiometer
Relay setpoint & deadband field configured
API 3200 G M01     Control input: DC volts
Feedback: 1-5 VDC or specify
Relay setpoint & deadband field configured
API 3200 G M03     Control input: DC volts or current
Feedback potentiometer using <100% of range
Relay setpoint & deadband field configured
API 3200 G M420     Control input: DC current
Feedback: 4-20 mA
Relay setpoint & deadband field configured