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LEEDS & NORTHRUP Controls

Our inventory currently carries over 9 new and used Leeds & Northrup Controls. Please click into any of the products listed below to view product details:

 

SKU Model Description
21663 74419 LEEDS & NORTHRUP 74419 CONTROL BOARD
20068 74441 LEEDS & NORTHRUP 74441 CONTROL BOARD
18578 74431 LEEDS & NORTHRUP 74431 CONTROL BOARD
18313 78705 LEEDS & NORTHRUP 78705 CONTROL BOARD
18048 74417 LEEDS & NORTHRUP 74417 CONTROL BOARD
15183 228261 LEEDS & NORTHRUP 228261 CONTROL BOARD
10589 74403 LEEDS & NORTHRUP 74403 CONTROL BOARD
9229 450-6-A104-51-12 LEEDS & NORTHRUP 450-6-A104-51-12 TEMPERATURE CONTROLLER
8423 74867 LEEDS & NORTHRUP 74867 CONTROL BOARD
Leeds & Northrup Millitemp Indicators & Controllers Instructions & Manual dq
Leeds & Northrup Millitemp Indicators & Controllers Instructions & Manual dq
$8.99 USD reduced from $10.00 USD
LEEDS NORTHRUP 056861 KEYBOARD CONTROL PANEL 678
LEEDS NORTHRUP 056861 KEYBOARD CONTROL PANEL 678
$12.50 USD reduced from $14.00 USD
Leeds Northrup Control System Employing L&N C.A.T Control Units Directions
Leeds Northrup Control System Employing L&N C.A.T Control Units Directions
$13.86 USD reduced from $15.00 USD
Leeds & Northrup Model C1 M-Line Series 71 C.A.T Controller Directions 177251
Leeds & Northrup Model C1 M-Line Series 71 C.A.T Controller Directions 177251
$15.03 USD reduced from $17.00 USD
1951 Leeds & Northrup Philadelphia Electromax Temperature Controllers Print Ad
1951 Leeds & Northrup Philadelphia Electromax Temperature Controllers Print Ad
$15.31 USD reduced from $17.00 USD
Leeds Northrup Series 80. 3-Action C.A.T Controller Directions 177531 Issue 2
Leeds Northrup Series 80. 3-Action C.A.T Controller Directions 177531 Issue 2
$15.61 USD reduced from $17.00 USD
Leeds Northrup Speedomax H Recorders, Controller, Indicators Catalog 179001~1970
Leeds Northrup Speedomax H Recorders, Controller, Indicators Catalog 179001~1970
$15.61 USD reduced from $17.00 USD
Leeds Northrup Speedomax H Recorders, Controller, Indicators Catalog 179001~1966
Leeds Northrup Speedomax H Recorders, Controller, Indicators Catalog 179001~1966
$15.63 USD reduced from $17.00 USD
Leeds & Northrup Series 80 3-Acting C.A.T. Controller-Directions 177531 Rev. C
Leeds & Northrup Series 80 3-Acting C.A.T. Controller-Directions 177531 Rev. C
$20.00 USD reduced from $22.00 USD
Leeds & Northrup 420 C.A.T. Controller Directions 177546 Issue 5
Leeds & Northrup 420 C.A.T. Controller Directions 177546 Issue 5
$20.00 USD reduced from $22.00 USD
Leeds & Northrup 7083 Analyzer/Controller Operators 277553 Rev. B
Leeds & Northrup 7083 Analyzer/Controller Operators 277553 Rev. B
$20.00 USD reduced from $22.00 USD
Leeds & Northrup Centry 441 Triac Output Controller Directions 177841 Rev. G
Leeds & Northrup Centry 441 Triac Output Controller Directions 177841 Rev. G
$20.00 USD reduced from $22.00 USD
Leeds & Northrup 6430 & 6460 Series Electromax III Controllers Directions Rev J1
Leeds & Northrup 6430 & 6460 Series Electromax III Controllers Directions Rev J1
$20.00 USD reduced from $22.00 USD
Leeds & Northrup 7084 Microprocessor pH & Analyzer/Controller Service Manual A
Leeds & Northrup 7084 Microprocessor pH & Analyzer/Controller Service Manual A
$20.00 USD reduced from $22.00 USD
Leeds & Northrup Multi-Position Electric Control Drive Mechanisms 10260-P-Y
Leeds & Northrup Multi-Position Electric Control Drive Mechanisms 10260-P-Y
$20.00 USD reduced from $22.00 USD
Leeds & Northrup Parts Catalog 179018-1975 Speedomax W Recorders & Controllers
Leeds & Northrup Parts Catalog 179018-1975 Speedomax W Recorders & Controllers
$20.00 USD reduced from $22.00 USD
Leeds & Northrup Max1 Distributed Control Service Manual 277212 Rev A
Leeds & Northrup Max1 Distributed Control Service Manual 277212 Rev A
$24.99 USD reduced from $27.00 USD
Graphic Controls (Fit Leeds & Northrup Recorders) 82-44-0023-03A Blue - NEW
Graphic Controls (Fit Leeds & Northrup Recorders) 82-44-0023-03A Blue - NEW
$27.99 USD reduced from $31.00 USD
Leeds & Northrup 7081 pH Receiver / Controller pH & Conductivity Manual
Leeds & Northrup 7081 pH Receiver / Controller pH & Conductivity Manual
$29.99 USD reduced from $33.00 USD
444920 REV N1 LEEDS & NORTHRUP CONTROLER CARD SL NO 584796
444920 REV N1 LEEDS & NORTHRUP CONTROLER CARD SL NO 584796
$30.00 USD reduced from $33.00 USD
Leeds Northrup Model 2402 Machine Temperature Controller (A10)
Leeds Northrup Model 2402 Machine Temperature Controller (A10)
$32.95 USD reduced from $36.00 USD
Leeds & Northrup N0231RW Bias Amplifier Control Circuit Board K023C
Leeds & Northrup N0231RW Bias Amplifier Control Circuit Board K023C
$35.99 USD reduced from $40.00 USD
LEEDS & NORTHRUP 277649 REV.F OPERATOR
LEEDS & NORTHRUP 277649 REV.F OPERATOR'S MANUAL, ELECTROMAX V CONTROLLER
$37.99 USD reduced from $42.00 USD
3 Rolls Graphic Controls Leeds & Northrup 661763-T3 Roll Chart Paper
3 Rolls Graphic Controls Leeds & Northrup 661763-T3 Roll Chart Paper
$39.00 USD reduced from $43.00 USD
Leeds & Northrup 101174 Amplifier Control Board
Leeds & Northrup 101174 Amplifier Control Board
$39.99 USD reduced from $44.00 USD
Leeds Northrup 019738 Three Channel Voltage Transformer PJ661M3, 8630-286-456
Leeds Northrup 019738 Three Channel Voltage Transformer PJ661M3, 8630-286-456
$40.00 USD reduced from $44.00 USD
LEEDS & NORTHRUP 043075 CONTROLLER BOARD
LEEDS & NORTHRUP 043075 CONTROLLER BOARD
$44.95 USD reduced from $49.00 USD
Leeds & Northrup Controller Card 444920 Rev N PCB Circuit Board
Leeds & Northrup Controller Card 444920 Rev N PCB Circuit Board
$49.95 USD reduced from $55.00 USD
Leeds Northrup 056861 Control Panel Keyboard Keypad Display Assy
Leeds Northrup 056861 Control Panel Keyboard Keypad Display Assy
$49.99 USD reduced from $55.00 USD
Leeds & Northrup Speed Control Board 193443 *No Box* New Surplus
Leeds & Northrup Speed Control Board 193443 *No Box* New Surplus
$50.00 USD reduced from $55.00 USD
LEEDS & NORTHRUP 1500 Controller Part No. 150052 (A20)
LEEDS & NORTHRUP 1500 Controller Part No. 150052 (A20)
$59.95 USD reduced from $66.00 USD
Leeds Northrup Electromax Controller 056098
Leeds Northrup Electromax Controller 056098
$64.99 USD reduced from $71.00 USD
Leeds & Northrup 150050 Model 1500 Controller
Leeds & Northrup 150050 Model 1500 Controller
$65.00 USD reduced from $72.00 USD
LEEDS & NORTHRUP SERIES 60 CONTROL 354163
LEEDS & NORTHRUP SERIES 60 CONTROL 354163
$65.00 USD reduced from $72.00 USD
Leeds & Northrup Series 80 Current Adjusting Controller with 320 day warranty!!
Leeds & Northrup Series 80 Current Adjusting Controller with 320 day warranty!!
$65.99 USD reduced from $73.00 USD
Leeds & Northrup 277650 Signal Loop Controller
Leeds & Northrup 277650 Signal Loop Controller
$66.01 USD reduced from $73.00 USD
Leeds & Northrup Controller 6432-6-4005-500-0-20 Type S with Enclosure
Leeds & Northrup Controller 6432-6-4005-500-0-20 Type S with Enclosure
$68.63 USD reduced from $75.00 USD
Leeds & Northrup 8008 A Circuit Board
Leeds & Northrup 8008 A Circuit Board
$69.99 USD reduced from $77.00 USD
LEEDS & NORTHRUP 150051 CONTROLLER - FREE SHIPPING
LEEDS & NORTHRUP 150051 CONTROLLER - FREE SHIPPING
$70.00 USD reduced from $77.00 USD
LEEDS & NORTHRUP,791573,LIMIT CONTROLLER
LEEDS & NORTHRUP,791573,LIMIT CONTROLLER
$70.00 USD reduced from $77.00 USD
Leeds Northrup Temperature Controller Model# 2402 (Primary Output 4-20mA
Leeds Northrup Temperature Controller Model# 2402 (Primary Output 4-20mA
$75.00 USD reduced from $83.00 USD
Leeds & Northrup Control Station Model A 423-21-11-205
Leeds & Northrup Control Station Model A 423-21-11-205
$78.00 USD reduced from $86.00 USD
Leeds & Northrup Control Station Model A Cat. No. 423-21-10-MAX-S
Leeds & Northrup Control Station Model A Cat. No. 423-21-10-MAX-S
$78.00 USD reduced from $86.00 USD
Leeds & Northrup 0303136-AS VME Bus Controller, Opened
Leeds & Northrup 0303136-AS VME Bus Controller, Opened
$79.00 AUD reduced from $87.00 AUD
Leeds & Northrup 0303122-AS Network Controller, Opened
Leeds & Northrup 0303122-AS Network Controller, Opened
$79.00 AUD reduced from $87.00 AUD
Leeds & Northrup Series 80 Current Adjusting Controller
Leeds & Northrup Series 80 Current Adjusting Controller
$80.00 USD reduced from $88.00 USD
USED Leeds & Northrup 056617, PC Alarm Circuit Board
USED Leeds & Northrup 056617, PC Alarm Circuit Board
$85.99 USD reduced from $95.00 USD
LEEDS & NORTHRUP CONTROLLER See Pics 30 Days Warranty
LEEDS & NORTHRUP CONTROLLER See Pics 30 Days Warranty
$89.00 USD reduced from $98.00 USD
Leeds Northrup 056861 Control Panel Keyboard Keypad Display Assy
Leeds Northrup 056861 Control Panel Keyboard Keypad Display Assy
$89.99 USD reduced from $99.00 USD
1 USED LEEDS & NORTHRUP 6011-3-06-1-0-00-00-000 CONTROLLER ***MAKE OFFER***
1 USED LEEDS & NORTHRUP 6011-3-06-1-0-00-00-000 CONTROLLER ***MAKE OFFER***
$99.99 USD reduced from $110.00 USD
Leeds & Northrup 030663 Rev B Control Circuit Board
Leeds & Northrup 030663 Rev B Control Circuit Board
$99.99 USD reduced from $110.00 USD
Leeds Northrup Temperature Deviation Controller 0-2000° F Vintage As Is Untested
Leeds Northrup Temperature Deviation Controller 0-2000° F Vintage As Is Untested
$99.99 USD reduced from $110.00 USD
Vintage Leeds & Northrup 8657-C Temperature Potentiometer Untested
Vintage Leeds & Northrup 8657-C Temperature Potentiometer Untested
$100.00 USD reduced from $110.00 USD
Vintage Leeds & Northrup PCA Master Control Card 444360 L&N
Vintage Leeds & Northrup PCA Master Control Card 444360 L&N
$100.00 USD reduced from $110.00 USD
Leeds & Northrup 6437-4-4131-100-0-20-805 Electromax Controller Enclosure Only
Leeds & Northrup 6437-4-4131-100-0-20-805 Electromax Controller Enclosure Only
$100.33 USD reduced from $110.00 USD
1 USED LEEDS NORTHRUP 6014-3-17-1-0-00-00-110 ELECTROMAX CONTROLLER *MAKE OFFER*
1 USED LEEDS NORTHRUP 6014-3-17-1-0-00-00-110 ELECTROMAX CONTROLLER *MAKE OFFER*
$119.99 USD reduced from $132.00 USD
LEEDS & NORTHRUP,063232,ANALOG CONTROL BOARD NOS
LEEDS & NORTHRUP,063232,ANALOG CONTROL BOARD NOS
$125.00 USD reduced from $138.00 USD
LEEDS-NORTHRUP CENTURY 464 CONTROLLER TRASMITER CALIBRATION TEST
LEEDS-NORTHRUP CENTURY 464 CONTROLLER TRASMITER CALIBRATION TEST
$130.00 USD reduced from $143.00 USD
Leeds & Northrup Instruments - 055931 - Controller
Leeds & Northrup Instruments - 055931 - Controller
$137.50 USD reduced from $151.00 USD
LEEDS NORTHRUP 7084 PH ANALYZER / CONTROLLER 120/240V AC
LEEDS NORTHRUP 7084 PH ANALYZER / CONTROLLER 120/240V AC
$149.00 USD reduced from $164.00 USD
Leeds & Northrup 7083-11 PH Analyzer / Controller 120/240 V 50/60 Hz 15 VA
Leeds & Northrup 7083-11 PH Analyzer / Controller 120/240 V 50/60 Hz 15 VA
$149.99 USD reduced from $165.00 USD
Leeds & Northrup Process Controller
Leeds & Northrup Process Controller
$150.00 USD reduced from $165.00 USD
Leeds & Northrup Controller Card 444920 Rev. N *No Box* New Surplus
Leeds & Northrup Controller Card 444920 Rev. N *No Box* New Surplus
$150.00 USD reduced from $165.00 USD
Leeds & Northrup Controller Card 444920 Rev. R *No Box* New Surplus
Leeds & Northrup Controller Card 444920 Rev. R *No Box* New Surplus
$150.00 USD reduced from $165.00 USD
USED LEEDS & NORTHRUP 150051 TEMPERATURE CONTROLLER
USED LEEDS & NORTHRUP 150051 TEMPERATURE CONTROLLER
$155.00 USD reduced from $171.00 USD
LEEDS NORTHRUP CONTROLLER CIRCUIT BOARD 046304 RARE NEW $199
LEEDS NORTHRUP CONTROLLER CIRCUIT BOARD 046304 RARE NEW $199
$158.99 USD reduced from $175.00 USD
Leeds & Northrup 056355 Resistivity Controller 7082-17
Leeds & Northrup 056355 Resistivity Controller 7082-17
$159.00 USD reduced from $175.00 USD
LEEDS & NORTHRUP,022235,CONTROL CARD MODULE
LEEDS & NORTHRUP,022235,CONTROL CARD MODULE
$175.00 USD reduced from $193.00 USD
Leeds Northrup 444727 Master Controller Board Rev K
Leeds Northrup 444727 Master Controller Board Rev K
$181.93 USD reduced from $200.00 USD
LEEDS & NORTHRUP Controller 6432-4-4001-802-3-20-802 Used #31716
LEEDS & NORTHRUP Controller 6432-4-4001-802-3-20-802 Used #31716
$199.10 USD reduced from $219.00 USD
Leeds Northrup 056861 9204-095 Control Panel T39788
Leeds Northrup 056861 9204-095 Control Panel T39788
$200.00 USD reduced from $220.00 USD
Honeywell Leeds Northrup 074419 Control Board L&N Rev C
Honeywell Leeds Northrup 074419 Control Board L&N Rev C
$205.20 USD reduced from $226.00 USD
Leeds & Northrup 150051 Temperature Controller
Leeds & Northrup 150051 Temperature Controller
$213.17 USD reduced from $234.00 USD
1 USED LEEDS & NORTHRUP 6004-007-100 ELECTROMAX CONTROLLER ***MAKE OFFER***
1 USED LEEDS & NORTHRUP 6004-007-100 ELECTROMAX CONTROLLER ***MAKE OFFER***
$229.99 USD reduced from $253.00 USD
Leeds & Northrup 030663 Servo Amplifier Board 030662
Leeds & Northrup 030663 Servo Amplifier Board 030662
$236.44 USD reduced from $260.00 USD
NEW LEEDS & NORTHRUP CONTROL BOARD 078691
NEW LEEDS & NORTHRUP CONTROL BOARD 078691
$269.99 USD reduced from $297.00 USD
LEEDS & NORTHRUP 6012-3-03-1-0-00-00-100 ELECTROMAX TEMPERATURE CONTROLLER, 120V
LEEDS & NORTHRUP 6012-3-03-1-0-00-00-100 ELECTROMAX TEMPERATURE CONTROLLER, 120V
$278.00 USD reduced from $306.00 USD
Leeds & Northrup Series-60 C.A.T. Controller USED
Leeds & Northrup Series-60 C.A.T. Controller USED
$279.99 USD reduced from $308.00 USD
LEEDS NORTHRUP 205376 REV A CONTROL IMPULSE LOGIC II MODULE / BOARD
LEEDS NORTHRUP 205376 REV A CONTROL IMPULSE LOGIC II MODULE / BOARD
$286.00 USD reduced from $315.00 USD
Leeds & Northrup 074431 Control Board
Leeds & Northrup 074431 Control Board
$295.00 USD reduced from $325.00 USD
LEEDS & NORTHRUP 056369 DATA ANALYZER CONTROL BOARD REV. C/C1 NEW b28
LEEDS & NORTHRUP 056369 DATA ANALYZER CONTROL BOARD REV. C/C1 NEW b28
$299.99 USD reduced from $330.00 USD
Leeds & Northrup 101342 Circuit Board New NOS Burr Brown 3292 - 3/14 Controller
Leeds & Northrup 101342 Circuit Board New NOS Burr Brown 3292 - 3/14 Controller
$300.00 USD reduced from $330.00 USD
NEW Honeywell Leeds Northrup 005791 Control Board Alarm Card Rev G/G
NEW Honeywell Leeds Northrup 005791 Control Board Alarm Card Rev G/G
$300.00 USD reduced from $330.00 USD
NEW LEEDS & NORTHRUP CONTROL BOARD 074437 REVISION E
NEW LEEDS & NORTHRUP CONTROL BOARD 074437 REVISION E
$314.99 USD reduced from $346.00 USD
1 USED LEEDS NORTHRUP 6014-3-06-1-0-00-00-000 ELECTROMAX CONTROLLER *MAKE OFFER*
1 USED LEEDS NORTHRUP 6014-3-06-1-0-00-00-000 ELECTROMAX CONTROLLER *MAKE OFFER*
$319.99 USD reduced from $352.00 USD
Leeds & Northrup 074417 PC Control Board Rev CR16 Tested
Leeds & Northrup 074417 PC Control Board Rev CR16 Tested
$324.00 USD reduced from $356.00 USD
Leeds & Northrup 444727 Circuit Board L&N NOS Master Controller NEW TURBINE
Leeds & Northrup 444727 Circuit Board L&N NOS Master Controller NEW TURBINE
$330.00 USD reduced from $363.00 USD
Leeds & Northrup 074441 Converter Board Rev A2 Control Board
Leeds & Northrup 074441 Converter Board Rev A2 Control Board
$340.19 USD reduced from $374.00 USD
Leeds & Northrup 205306 DC Power Switch Board
Leeds & Northrup 205306 DC Power Switch Board
$349.33 USD reduced from $384.00 USD
Leeds Northrup Temperature Deviation Controller 0-2000° F Vintage #002A20
Leeds Northrup Temperature Deviation Controller 0-2000° F Vintage #002A20
$350.00 USD reduced from $385.00 USD
Leeds Northrup Temperature Deviation Controller 0-1500° F Vintage #001A20
Leeds Northrup Temperature Deviation Controller 0-1500° F Vintage #001A20
$350.00 USD reduced from $385.00 USD
Leeds & Northrup 022230 Rev C Control Card L&N
Leeds & Northrup 022230 Rev C Control Card L&N
$360.50 USD reduced from $397.00 USD
LEEDS & NORTHRUP 043075 CONTROLLER BOARD
LEEDS & NORTHRUP 043075 CONTROLLER BOARD
$399.00 USD reduced from $439.00 USD
Leeds & Northrup Centry Current Output Controller Mod #440-1-20-31-51-A140 (NIB)
Leeds & Northrup Centry Current Output Controller Mod #440-1-20-31-51-A140 (NIB)
$425.00 USD reduced from $468.00 USD
Leeds & Northrup 770527 Motor Control Part And Accessory T209737
Leeds & Northrup 770527 Motor Control Part And Accessory T209737
$499.99 USD reduced from $550.00 USD
Leeds Northrup 7083-10 Ph Analyzer/controller 120/240v-ac
Leeds Northrup 7083-10 Ph Analyzer/controller 120/240v-ac
$529.56 USD reduced from $583.00 USD
LEEDS & NORTHRUP 7082-11 / 708211 pH CONTROLLER 120/240V 50/60Hz 15VA 056316
LEEDS & NORTHRUP 7082-11 / 708211 pH CONTROLLER 120/240V 50/60Hz 15VA 056316
$600.00 USD reduced from $660.00 USD
Leeds Northrup 056316 PH Controller, 120/240V
Leeds Northrup 056316 PH Controller, 120/240V
$678.80 USD reduced from $747.00 USD
MDA-16-1.02 | Leeds & Northrup | PLC Module, Opened
MDA-16-1.02 | Leeds & Northrup | PLC Module, Opened
$749.00 USD reduced from $824.00 USD
LEEDS & NORTHRUP 6017-3-03-1-O-00-00-100 ELECTROMAX CONTROLLER, TYPE J
LEEDS & NORTHRUP 6017-3-03-1-O-00-00-100 ELECTROMAX CONTROLLER, TYPE J
$1,499.99 USD reduced from $1,650.00 USD
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301 Moved Permanently

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Got extra Leeds & Northrup controls on your hand that you no longer need? Let us buy them from you! We purchase new & used controls by Leeds & Northrup.

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Why Buy From Us

Here's what people say about their recent experience with us:
Thomas Pfeiffer 1 hour ago
Item as described. Shipped quickly and packaged well. Thanks!
Scott Emerson 4 hours ago
very good customer service, timely delivery
Atwell Enterprise Inc 4 hours ago
Item as described. Fast shipping. Will buy from again.
Dave Wrestler 5 hours ago
Works fine as advertised and is what i need. Great seller information.
Jason Koss 8 hours ago
Arrived early, Just what I ordered, Great seller
David Lindley 11 hours ago
exactly as described, fast shipping, smooth transaction; would buy from again A+
Dmitry Khramtsov 11 hours ago
Excellent Seller!!! Great Transaction & Communication!!
Chris Drinkwater 11 hours ago
Looks to be in great condition. trustworthy seller
David Regnersen 11 hours ago
arrived fast, good looking product. price was good enough,shipping a little high
Greg f Crossman 14 hours ago
Goods received as stated in a timely manner. Thanks!

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