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:

Leeds & Northrup Millitemp Indicators & Controllers Instructions & Manual dq
$6.29 USD reduced from $~~7.00~~ USD

Leeds Northrup Control System Employing L&N C.A.T Control Units Directions
$15.84 USD reduced from $~~17.00~~ USD

Leeds & Northrup Model C1 M-Line Series 71 C.A.T Controller Directions 177251
$16.83 USD reduced from $~~19.00~~ USD

Leeds Northrup Series 80. 3-Action C.A.T Controller Directions 177531 Issue 2
$17.83 USD reduced from $~~20.00~~ USD

Leeds & Northrup Series 80 3-Acting C.A.T. Controller-Directions 177531 Rev. C
$20.00 USD reduced from $~~22.00~~ USD

Leeds & Northrup Centry 441 Triac Output Controller Directions 177841 Rev. G
$20.00 USD reduced from $~~22.00~~ USD

Leeds & Northrup 420 C.A.T. Controller Directions 177546 Issue 5
$20.00 USD reduced from $~~22.00~~ USD

Leeds & Northrup 7084 Microprocessor pH & Analyzer/Controller Service Manual A
$20.00 USD reduced from $~~22.00~~ USD

Leeds & Northrup 6430 & 6460 Series Electromax III Controllers Directions Rev J1
$20.00 USD reduced from $~~22.00~~ USD

Leeds & Northrup Multi-Position Electric Control Drive Mechanisms 10260-P-Y
$20.00 USD reduced from $~~22.00~~ USD

Leeds & Northrup 7083 Analyzer/Controller Operators 277553 Rev. B
$20.00 USD reduced from $~~22.00~~ USD

LEEDS & NORTHRUP 177529 P.A.T. CONTROLLER SERIES 80 3-ACTION ISSUE 2 - FREE SHIP
$22.24 USD reduced from $~~24.00~~ USD

LEEDS & NORTHRUP 444508 DRIVER BOARD with SHIELD
$25.00 USD reduced from $~~28.00~~ USD

LEEDS NORTHRUP 6011-3-08-1-7-00-00-103 ELECTROMAX CONTROLLER
$26.12 USD reduced from $~~29.00~~ USD

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
$29.99 USD reduced from $~~33.00~~ USD

Leeds & Northrup N0231RW Bias Amplifier Control Circuit Board K023C
$32.39 USD reduced from $~~36.00~~ USD

Leeds Northrup Model 2402 Machine Temperature Controller (A10)
$32.95 USD reduced from $~~36.00~~ USD

Leeds Northrup 056861, Control Panel 078152 KEYBOARD KEYPAD ,FF
$35.00 USD reduced from $~~39.00~~ USD

Leeds & Northrup 101174 Amplifier Control Board
$37.99 USD reduced from $~~42.00~~ USD

Leeds Northrup 019738 Three Channel Voltage Transformer PJ661M3, 8630-286-456
$40.00 USD reduced from $~~44.00~~ USD

LEEDS & NORTHRUP 043075 CONTROLLER BOARD
$44.95 USD reduced from $~~49.00~~ USD

LEEDS & NORTHRUP 043075 CONTROLLER BOARD * USED *
$45.00 USD reduced from $~~50.00~~ USD

Leeds Northrup 1199-47 Temperature Compensator Controls
$48.48 USD reduced from $~~53.00~~ USD

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.
$50.00 USD reduced from $~~55.00~~ USD

LEEDS NORTHRUP 056861 KEYBOARD CONTROL PANEL 678
$50.00 USD reduced from $~~55.00~~ USD

NEW 4973 LEEDS & NORTHRUP CONDUCTIVITY CELL 4973-1-333-20-000
$55.00 USD reduced from $~~61.00~~ USD

Leeds & Northrup 150050 Model 1500 Controller
$58.50 USD reduced from $~~64.00~~ USD

Leeds & Northrup Controller Card 444920 Rev N PCB Circuit Board
$59.95 USD reduced from $~~66.00~~ USD

LEEDS & NORTHRUP 1500 Controller Part No. 150052 (A20)
$59.95 USD reduced from $~~66.00~~ USD

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!!
$65.99 USD reduced from $~~73.00~~ USD

Leeds & Northrup 8008 A Circuit Board
$66.49 USD reduced from $~~73.00~~ USD

Leeds & Northrup Model 1400 Temperature Controller
$70.00 USD reduced from $~~77.00~~ USD

LEEDS & NORTHRUP 150051 CONTROLLER - FREE SHIPPING
$70.00 USD reduced from $~~77.00~~ USD

LEEDS & NORTHRUP,791573,LIMIT CONTROLLER
$70.00 USD reduced from $~~77.00~~ USD

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
$78.00 USD reduced from $~~86.00~~ USD

Leeds & Northrup Control Station Model A Cat. No. 423-21-10-MAX-S
$78.00 USD reduced from $~~86.00~~ USD

Leeds & Northrup Control Station Model A Cat. No. 423-21-10
$78.00 USD reduced from $~~86.00~~ USD

Leeds & Northrup Series 80 Current Adjusting Controller
$80.00 USD reduced from $~~88.00~~ USD

Leeds & Northrup 277650 Signal Loop Controller
$80.83 USD reduced from $~~89.00~~ USD

Leeds & Northrup 030663 Rev B Control Circuit Board
$89.99 USD reduced from $~~99.00~~ USD

Leeds Northrup 056861 Control Panel Keyboard Keypad Display Assy
$89.99 USD reduced from $~~99.00~~ USD

LEEDS & NORTHRUP ELECTROMAX SINGLE LOOP CONTROLLER 6012-3-03-1-7-00-00-100 (E6)
$90.00 USD reduced from $~~99.00~~ USD

1 USED LEEDS & NORTHRUP 6011-3-06-1-0-00-00-000 CONTROLLER ***MAKE OFFER***
$99.99 USD reduced from $~~110.00~~ USD

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 Board
$115.33 USD reduced from $~~127.00~~ USD

Leeds & Northrup Instruments - 055931 - Controller
$116.88 USD reduced from $~~129.00~~ USD

1 USED LEEDS & NORTHRUP 6014-3-17-1-0-00-00-110 ELECTROMAX PROCESS CONTROLLER
$119.99 USD reduced from $~~132.00~~ USD

LEEDS & NORTHRUP 030213 PRESSURE CONTROL BOARD *USED*
$125.00 USD reduced from $~~138.00~~ USD

LEEDS & NORTHRUP,063232,ANALOG CONTROL BOARD NOS
$125.00 USD reduced from $~~138.00~~ USD

LEEDS-NORTHRUP CENTURY 464 CONTROLLER TRASMITER CALIBRATION TEST
$130.00 USD reduced from $~~143.00~~ USD

Leeds Northrup 7082-18 Resistivity Controller
$136.30 USD reduced from $~~150.00~~ USD

Leeds & Northrup Company 420 Type-P Controller In: 120V 50/60Hz 14VA Out:120V 1A
$148.50 USD reduced from $~~163.00~~ USD

LEEDS & NORTHRUP PH ANALYZER CONTROLLER 07082-41 086311 120/240 VAC
$149.00 USD reduced from $~~164.00~~ USD

LEEDS NORTHRUP 7084 PH ANALYZER / CONTROLLER 120/240V AC
$149.00 USD reduced from $~~164.00~~ USD

LEEDS &NORTHRUP CONTROLLER 601-3-04-1-0-00-00-00 *USED*
$150.00 USD reduced from $~~165.00~~ USD

Leeds & Northrup Process Controller
$150.00 USD reduced from $~~165.00~~ USD

Leeds & Northrup Controller Card 444920 Rev. R *No Box* New Surplus
$150.00 USD reduced from $~~165.00~~ USD

Leeds & Northrup Controller Card 444920 Rev. N *No Box* New Surplus
$150.00 USD reduced from $~~165.00~~ USD

Leeds & Northrup Control Board INF-10K *No Box* New Surplus
$150.00 USD reduced from $~~165.00~~ USD

USED LEEDS & NORTHRUP 150051 TEMPERATURE CONTROLLER
$155.00 USD reduced from $~~171.00~~ USD

LEEDS NORTHRUP CONTROLLER CIRCUIT BOARD 046304 RARE NEW $199
$158.99 USD reduced from $~~175.00~~ USD

Leeds & Northrup 056355 Resistivity Controller 7082-17
$159.00 USD reduced from $~~175.00~~ USD

LEEDS & NORTHRUP,022235,CONTROL CARD MODULE
$175.00 USD reduced from $~~193.00~~ USD

Leeds Northrup 444727 Master Controller Board Rev K
$191.18 USD reduced from $~~210.00~~ USD

Leeds & Northrup pH Transmitter Analyzer Controller, 056316, 7082-11
$198.00 USD reduced from $~~218.00~~ USD

LEEDS & NORTHRUP Controller 6432-4-4001-802-3-20-802 Used #31716
$199.10 USD reduced from $~~219.00~~ USD

LEEDS-NORTHRUP CENTURY 464 CONTROLLER TRASMITER CALIBRATION TEST
$200.00 USD reduced from $~~220.00~~ USD

Honeywell Leeds Northrup 074419 Control Board L&N Rev C
$205.20 USD reduced from $~~226.00~~ USD

1 USED LEEDS & NORTHRUP 6004-007-100 ELECTROMAX CONTROLLER ***MAKE OFFER***
$229.99 USD reduced from $~~253.00~~ USD

USED LEEDS & NORTHRUP 046263 LOGIC BOARD REV C A1A1A3
$250.00 USD reduced from $~~275.00~~ USD

NEW LEEDS & NORTHRUP CONTROL BOARD 078691
$269.99 USD reduced from $~~297.00~~ USD

LEEDS NORTHRUP 205376 REV A CONTROL IMPULSE LOGIC II MODULE / BOARD
$286.00 USD reduced from $~~315.00~~ USD

Leeds & Northrup Series-60 Vintage Controller Speedomax H 2-901-001-0048-6-024-0
$299.99 USD reduced from $~~330.00~~ USD

LEEDS & NORTHRUP 056369 DATA ANALYZER CONTROL BOARD REV. C/C1 NEW b28
$299.99 USD reduced from $~~330.00~~ USD

USED HONEYWELL LEEDS & NORTHRUP 078691 CONTROL BOARD
$300.00 USD reduced from $~~330.00~~ USD

NEW Honeywell Leeds Northrup 005791 Control Board Alarm Card Rev G/G
$300.00 USD reduced from $~~330.00~~ USD

Leeds & Northrup 074417 PC Control Board Rev CR16 Tested
$324.00 USD reduced from $~~356.00~~ USD

Leeds & Northrup 074441 Converter Board Rev A2 Control Board
$340.19 USD reduced from $~~374.00~~ USD

Leeds & Northrup 080438 Distributed Processing Unit
$348.95 USD reduced from $~~384.00~~ USD

MAX CONTROL SYSTEMS LEEDS & NORTHRUP 080421 High Level Analog Input
$348.96 USD reduced from $~~384.00~~ USD

Leeds & Northrup 205306 DC Power Switch Board
$349.33 USD reduced from $~~384.00~~ USD

LEEDS & NORTHRUP 063232 CONTROL BOARD REV. B1/C3 BRAND NEW b27
$349.99 USD reduced from $~~385.00~~ USD

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
$350.00 USD reduced from $~~385.00~~ USD

LEEDS & NORTHRUP 074431 NEW CONTROL BOARD 074431
$350.00 USD reduced from $~~385.00~~ USD

Leeds & Northrup 048192 Alarm Processor Control Board W/Keypad
$388.77 USD reduced from $~~428.00~~ USD

LEEDS & NORTHRUP 043075 CONTROLLER BOARD
$399.00 USD reduced from $~~439.00~~ USD

LEEDS & NORTHRUP 063232 ANALOG MODULE CONTROL *NEW NO BOX*
$407.00 USD reduced from $~~448.00~~ USD

LEEDS & NORTHRUP CO. 043075 CONTROLLER BOARD - NEW - BEX314Q - *FREE SHIPPING*
$450.00 USD reduced from $~~495.00~~ USD

LEEDS & NORTHRUP 074417 CONTROL BOARD REPAIRED
$450.00 USD reduced from $~~495.00~~ USD

LEEDS & NORTHRUP ELECTROMAX CONTROLLER
$500.00 USD reduced from $~~550.00~~ USD

NEW LEEDS & NORTHRUP 043075 CONTROLLER BOARD
$600.00 USD reduced from $~~660.00~~ USD

NEW LEEDS & NORTHRUP 078691 CONTROL BOARD
$600.00 USD reduced from $~~660.00~~ USD

Leeds Northrup 056316 PH Controller, 120/240V
$678.80 USD reduced from $~~747.00~~ USD

Leeds & Northrup 76916573-1 0087795 Micromax Control T203077
$999.99 USD reduced from $~~1,100.00~~ USD

Nos Surplus LEEDS & NORTHRUP 6011321173000100 ELECTROMAX CONTROLLER
$1,999.99 USD reduced from $~~2,200.00~~ USD

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Looking for Leeds & Northrup controls? Whether if you need one or bulk quantity, our trained B2B sales staff are often able to source the quantity you need at competitive prices.

We Buy

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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Are you a distributor for Leeds & Northrup controls? We would like to work with you! We have a growing list of buyers who are regularly looking for Leeds & Northrup controls.

Why Buy From Us

Here's what people say about their recent experience with us:

JOSEPH MONTINERI 1 hour ago

Item arrived with a defect, but they took care of it quickly & fairly. =)

yin shi 2 hours ago

Item as described. Fast shipping. Will buy from again.

Igor Tkachenko 5 hours ago

item was exactly as describe - thank you

Keith Matthes 5 hours ago

Excellent item and transaction. Many thanks! ARIGATO!

Dwight Clanton 6 hours ago

Shipping was quick, their CS even sent the product manual via email. Impressive!

Donald R Matheus 8 hours ago

Works fine as advertised and is what i need. Great seller information.

John Weritz 9 hours ago

Looks to be in great condition. trustworthy seller

Ronald Luter 10 hours ago

item as described, packed well and shipped promptly

Evan Morgan 11 hours ago

Great Transaction!!! Excellent Communication!!!! A+++

JOHN PICKARD 14 hours ago

Excellent Seller!!! Great Transaction & Communication!!

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

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