LEEDS NORTHRUP Controls

Our inventory currently carries over 26 new and used Leeds Northrup Controls. Please click into any of the products listed below to view product details:

SKU	Model	Description
29612	56515	LEEDS NORTHRUP 56515 ANALOG OUTPUT MODULE
29350	80403	LEEDS NORTHRUP 80403 ANALOG OUTPUT MODULE
29110	80424	LEEDS NORTHRUP 80424 ANALOG OUTPUT MODULE
26079	444347	LEEDS NORTHRUP 444347 PCB CIRCUIT BOARD
25857	444508	LEEDS NORTHRUP 444508 PCB CIRCUIT BOARD
25840	NAPC-2A8501E	LEEDS NORTHRUP NAPC-2A8501E PCB CIRCUIT BOARD
25765	444347 7952-3	LEEDS NORTHRUP 444347 7952-3 PCB CIRCUIT BOARD
25636	A1A1A3 078160	LEEDS NORTHRUP A1A1A3 078160 PCB CIRCUIT BOARD
25447	234502	LEEDS NORTHRUP 234502 PCB CIRCUIT BOARD
25377	078160 A1A1A3	LEEDS NORTHRUP 078160 A1A1A3 PCB CIRCUIT BOARD
24943	046263 A1A1A3	LEEDS NORTHRUP 046263 A1A1A3 PCB CIRCUIT BOARD
24637	64580	LEEDS NORTHRUP 64580 PCB CIRCUIT BOARD
24477	A1A2A1X 445860	LEEDS NORTHRUP A1A2A1X 445860 PCB CIRCUIT BOARD
24280	234503	LEEDS NORTHRUP 234503 PCB CIRCUIT BOARD
23692	6458320	LEEDS NORTHRUP 6458320 PCB CIRCUIT BOARD
23622	46280	LEEDS NORTHRUP 46280 PCB CIRCUIT BOARD
23272	A4-064581	LEEDS NORTHRUP A4-064581 PCB CIRCUIT BOARD
23244	234504	LEEDS NORTHRUP 234504 PCB CIRCUIT BOARD
23231	444297	LEEDS NORTHRUP 444297 PCB CIRCUIT BOARD
22977	64585	LEEDS NORTHRUP 64585 PCB CIRCUIT BOARD
22630	78701	LEEDS NORTHRUP 78701 PCB CIRCUIT BOARD
22287	445847 A1A1A3	LEEDS NORTHRUP 445847 A1A1A3 PCB CIRCUIT BOARD
22059	78697	LEEDS NORTHRUP 78697 PCB CIRCUIT BOARD
22015	46282	LEEDS NORTHRUP 46282 PCB CIRCUIT BOARD
21972	A1A1AXA2X	LEEDS NORTHRUP A1A1AXA2X PCB CIRCUIT BOARD
21940	78551	LEEDS NORTHRUP 78551 PCB CIRCUIT BOARD

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 Speedomax H Recorders, Controller, Indicators Catalog 179001~1970
$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 Multi-Position Electric Control Drive Mechanisms 10260-P-Y
$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 7083 Analyzer/Controller Operators 277553 Rev. B
$20.00 USD reduced from $~~22.00~~ USD

Leeds & Northrup Parts Catalog 179018-1975 Speedomax W Recorders & Controllers
$20.00 USD reduced from $~~22.00~~ USD

LEEDS & NORTHRUP 177529 P.A.T. CONTROLLER SERIES 80 3-ACTION ISSUE 2 - FREE SHIP
$24.99 USD reduced from $~~27.00~~ USD

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

Leeds Northrup A1A1A5 196443 Speed Control Board
$27.48 USD reduced from $~~30.00~~ USD

Graphic Controls (Fit Leeds & Northrup Recorders) 82-44-0023-03A Blue - NEW
$27.99 USD reduced from $~~31.00~~ USD

Huge Vtg 1940 Industrial Blueprint Leeds Northrup Electric Control Signal Lights
$28.00 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 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 150051 CONTROLLER - FREE SHIPPING
$70.00 USD reduced from $~~77.00~~ USD

Leeds & Northrup Model 1400 Temperature Controller
$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 Controller 6432-6-4005-500-0-20 Type S with Enclosure
$76.25 USD reduced from $~~84.00~~ 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 277650 Signal Loop Controller
$78.81 USD reduced from $~~87.00~~ USD

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

USED Leeds & Northrup 056617, PC Alarm Circuit Board
$85.99 USD reduced from $~~95.00~~ 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,063232,ANALOG CONTROL BOARD NOS
$125.00 USD reduced from $~~138.00~~ USD

LEEDS & NORTHRUP 030213 PRESSURE CONTROL BOARD *USED*
$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 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. N *No Box* New Surplus
$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 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 Company 420 Type-P Controller In: 120V 50/60Hz 14VA Out:120V 1A
$165.00 USD reduced from $~~182.00~~ 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

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 101342 Circuit Board New NOS Burr Brown 3292 - 3/14 Controller
$300.00 USD reduced from $~~330.00~~ USD

USED HONEYWELL LEEDS & NORTHRUP 078691 CONTROL BOARD
$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 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
$340.19 USD reduced from $~~374.00~~ 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 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 022230 Rev C Control Card L&N
$360.50 USD reduced from $~~397.00~~ 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

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

301 Moved Permanently

cloudflare

We Source

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.

We Distribute

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:

Joel Genzink 1 hour ago

item was exactly as describe - thank you

Bill Faciane 2 hours ago

Very good experience. Will not hesitate to do business with them again.

ELECTROMIKE INC. 4 hours ago

In perfect condition, good price, quick delivery

Stroh Precision Die Casting Stroh 7 hours ago

Beautiful, Exactly as described. Thanks

Greg f Crossman 7 hours ago

Top notch seller-Best deals-extra fast shipping-great packing

Harlan Bailey 7 hours ago

Excellent Transaction,Product Just As Seller Advertised, Fast Shipping.

Anastassia Ash 9 hours ago

Great seller! Fast shipper, well packaged. EZ transaction, works great. Thanks!!

Jason Koss 10 hours ago

exceptional service, these guys really have their act together

jeff lenz 13 hours ago

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

Jose Reyes 16 hours ago

Item as described. Great product for a great price. Excellent Seller!

Browse Equipment

LEEDS NORTHRUP Controls

301 Moved Permanently

We Source

We Buy

We Distribute

More From LEEDS NORTHRUP

Why Buy From Us

About Us

Need Help?