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Browse a comprehensive range of professional test and measurement equipment at TT Instruments, your trusted source for high-quality fibre optic, telecommunications, RF, and electronic testing solutions. Our full collection includes everything from OTDRs, optical spectrum analysers, and fusion splicers to power meters, inspection scopes, and optical loss test sets, all sourced from leading manufacturers such as Viavi Solutions, EXFO, Fluke Networks, Fujikura, and Keysight Technologies. At TT Instruments, we specialise in supplying professionally tested, cost-effective used equipment that supports installation, maintenance, and troubleshooting across fibre optic and electronic networks, helping engineers and businesses achieve accurate, reliable results with equipment they can trust.

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We buy used, surplus and pre-owned test and laboratory equipment.

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Spirent MX2-10G-S4 4-port 10G/1GbE SFP+ test module front panel and PCB top view with copper heatsinks

Spirent MX2-10G-S4 test module angled left view showing full PCB with dual copper heatsinks and backplane connectors

SPIRENT MX2-10G-S4 MX2 4-PORT 10G/1GBE SFP+

Model: MX2-10G-S4

Manufacturer: Spirent

In stock: 1

SKU: 2836 4C02

Condition: Used

Price: Sale price £2,205.75

Viavi ONX-CATV-MODULE-ISDBT ISDB-T module rear view showing VIAVI label and F-connector port

Viavi ONX-CATV-MODULE-ISDBT rear panel showing module connector interface, VIAVI calibration sticker, and serial number label

Viavi JDSU OneExpert CATV Module ONX-CATV-MODULE-ISDBT ISDB-T Expert

Model: ONX-CATV-MODULE-ISDBT

Manufacturer: Viavi JDSU

In stock: 10

SKU: 6122 7D01

Condition: Used

Price: Sale price £165.75

Viavi OTU-5000 EOTDR2-L-B1-COTU full kit: main unit, E9E-EXTX-24 switch, rack shelf, power adapter, USB-ETH adapter, accessories and box

Viavi OTU-5000 EOTDR2-L-B1-COTU front panel showing numbered ports 1–16, USB, Ethernet, USB-C, power terminals and status LEDs

Viavi JDSU OTU 5000 EOTDR2-L-B1-COTU 2-port 1625nm OTDR + E9E-EXTX-24 Optical Swi

Model: EOTDR2-L-B1-COTU

Manufacturer: Viavi JDSU

In stock: 1

SKU: 2808 2B02

Condition: Used

Price: Sale price £1,525.75

Viavi FVAm-1000-S benchtop MPO microscope with FMAG-QSFP and FMAG-MPO adapters, power adapter and USB cable

Viavi FVAm-1000-S benchtop microscope stored in custom foam-lined carry case with accessories and EU power adapter

Viavi JDSU FVAm-1000-S Bench-Top MPO Autofocus Microscope with Screen FMAG-MPO A

Model: FVAm-1000-S

Manufacturer: Viavi JDSU

In stock: 1

SKU: 2780 3B04

Condition: Used

Price: Sale price £675.75

Viavi OTU-5000 and E9E-EXTX-36 complete bundle — both modules, rack shelf, brackets, power supplies and accessories laid out

Viavi OTU-5000 ONMSi maintenance screen showing firmware V20.10 and Peak Monitoring licence active

Viavi JDSU E9E-EXTX-36 36-Port External Switch LC-APC with OTU 5000 A1 OTDR

Model: E9E-EXTX-36

Manufacturer: Viavi JDSU

In stock: 1

SKU: 2805 2B03

Condition: Used

Price: Sale price £2,205.75

Viavi E98OSX144 144-port optical switch resting on original VIAVI branded box with foam packaging and accessory bag

Viavi E98OSX144 1RU rackmount 144-port optical switch front panel showing LC/APC ports, address DIP switch and rack ears

Viavi JDSU E98OSX144 High Port Density 144 Port Optical Switch For RFTS Solution

Model: E98OSX144

Manufacturer: Viavi JDSU

In stock: 1

SKU: 2804 2B02

Condition: Used

Price: Sale price £1,395.00

EXFO FTB-1 Pro carry bag — left front three-quarter angle showing side D-ring strap attachment and zip

EXFO Carry Bag for FTB-200/150 FTB-1 FTB-1 Pro FTB-1 v2

Model: Carry Bag

Manufacturer: EXFO

In stock: 8

SKU: 2700 3A02

Condition: Used

Price: Sale price £42.50

Teletech TS916 Loop-a-Line retractable oscillator leads (blue, red, white) with 4mm shrouded banana plugs and red/black crocodile clips

Teletech Loopaline Oscillator TS916 Retractable Oscillator Leads and Clips

Model: TS916 leads

Manufacturer: Teletech

In stock: 2

SKU: 6019 6F05

Condition: Used

Price: Sale price £42.50

EXFO FLS-140 Visual Fault Locator full side view showing EXFO branding, laser warning label and blue end cap

EXFO FLS-140 VFL reverse side showing CFR 1040.10 compliance text, CE marking and pocket clip

EXFO FLS-140 Visual Fault Locator w/ 2.5mm Universal Connector

Model: FLS-140

Manufacturer: EXFO

In stock: 13

SKU: 5850 6D02

Condition: Used

Price: Sale price £29.75

Narda 2244/90.20 E-field probe Type 8 full view — yellow foam isotropic sensor head, black rod, Lemo connector

Narda 2244/90.20 E-field probe Type 8 in protective plastic bag with TTInstruments product ID label #5801

Narda 2244/90.20 100kHz to 3GHz E-Field Probe (Type 8) RFI/EMI

Model: 2244/90.20

Manufacturer: Narda

In stock: 1

SKU: 5801 6E03

Condition: Used

Price: Sale price £505.75

Viavi FBPT-MU-L MU Bulkhead Long Reach Tip front view showing FBPT MU-L engraving and knurled collar

Viavi FBPT-MU-L MU Bulkhead Long Reach Tip angled view showing slotted probe tip, hex body and locking collar

Viavi FBPT-MU-L MU Bulkhead Tip Long Reach for FBP & FiberChek Probe Microscopes

Model: FBPT-MU-L

Manufacturer: Viavi JDSU

In stock: 5

SKU: 4614 6C02

Condition: Used

Price: Sale price £42.50

Narda 3501/03 Three-Axis Isotropic E-Field Antenna full front view showing yellow spherical head and black handle

Narda 3501/03 antenna handle label showing P/N 3501/03 S/N K-0758 calibration date 2017-11-21 by Wittig

Narda E-Field Isotropic Antenna Three-Axis 27 MHz - 3 GHz Probe RFI/EMI 3501/03

Model: 3501/03

Manufacturer: Narda

In stock: 1

SKU: 5799 7D04

Condition: Used

Price: Sale price £505.75

Keysight Agilent N2884A InfiniiMax Fine Wire Probing Kit front label showing model number and TTInstruments product ID tag

Agilent N2884A InfiniiMax Fine Wire Probing Kit open case showing probe arm and five fine-wire probing tips in foam tray

Keysight Agilent N2884A InfiniiMax Fine Wire Probing Kit Tips

Model: N2884A

Manufacturer: Agilent

In stock: 3

SKU: 5751 6G03

Condition: Used

Price: Sale price £51.00

JDSU Viavi 100GE 10x10G Electrical CFP Interface EL-IF 3061/92.98 — top view with label and TTInstruments product ID tag

JDSU ONT 100GE 10x10G EL-IF BN 3061/92.98 manufacturer accessory datasheet page showing electrical specifications

Viavi JDSU 100GE 10x10G Electrical CFP Interface EL-IF 3061/92.98

Model: 3061/92.98

Manufacturer: Viavi JDSU

In stock: 1

SKU: 5731 6E03

Condition: Used

Price: Sale price £165.75

Intec ARGUS 165 xDSL tester with Copper Box, carry case, power adapter, test leads and Ethernet cable

Intec ARGUS Copper Box V3 accessory showing four colour-coded test terminals a1/T1, b1/R1, a2/T2, b2/R2

Intec Argus 165 VDSL ADSL SHDSL Ethernet RFC 2544 w/ Options SFP TDR + V3 Copper Box

Model: Argus 165

Manufacturer: Intec Argus

In stock: 4

SKU: 5548 5D01

Condition: Used

Price: Sale price £420.75

Keysight Agilent N4861B MIPI D-PHY Serial Stimulus Probe front and top view with POD 1–6 and CLK POD connectors visible

Keysight Agilent N4861B close-up of front panel showing power button, USER CLK, S0, and D2p SMA connectors labelled 3.3V Max

Keysight Agilent N4861B MIPI D-PHY 3 Lane Digital Stimulus Probe N4861BR

Model: N4861B

Manufacturer: Agilent

In stock: 2

SKU: 5703 6D04

Condition: Used

Price: Sale price £1,270.75

BEST BST-050-JP multimeter test leads full set — red and black probes, cables, and spare needle tip covers

BEST BST-050-JP test leads in original retail box showing red and black probes, Made in China label

BST-050-JP Ultra Fine Soft Silicone 2000V 20A Multimeter Test Leads Probes

Model: BST-050-JP

Manufacturer: BST

In stock: 30

SKU: 5416 6G04

Condition: New

Price: Sale price £10.16

Fujikura FH-60-900 900µm fiber holder pair S014549 — front angled view showing both units with model labels

Fujikura FH-60-900 fiber holders S014549 — bottom view of both pairs showing V-groove channel and hinge mechanism

Fujikura FH-60-900 900µm Fiber Holders S014549 FOR 12S/70S/60S/22S & FSM-60/18..

Model: FH-60-900

Manufacturer: Fujikura

In stock: 4

SKU: 0003 5C03

Condition: Used

Price: Sale price £34.00

VIAVI FBPT-A801-1002P ARINC Type 1 size 15-06 alignment guide in sealed packaging with TTInstruments label

VIAVI FBPT-A801-1002P front face view showing six socket apertures and engraved part number

JDSU VIAVI FBPT-A801-1002P Rlug, ARINC, Type 1, size 15-06, sockets

Model: FBPT-A801-1002P

Manufacturer: Viavi JDSU

In stock: 1

SKU: 5672 6C02

Condition: Used

Price: Sale price £80.75

VIAVI FBPT-A801-1002R ARINC Type 1 size 15-06 receptacle in sealed bag with TTInstruments product label

VIAVI FBPT-A801-1002R front face view showing 7 pin holes and engraved part number on metal body

JDSU VIAVI FBPT-A801-1002R Receptacle, ARINC, Type 1, size 15-06, Pins

Model: FBPT-A801-1002R

Manufacturer: Viavi JDSU

In stock: 1

SKU: 5669 6C02

Condition: Used

Price: Sale price £80.75

Agilent N5322A Extended Interface Module — full top view showing PCB, mezzanine card, front panel connectors

Agilent N5322A front panel close-up showing SMA Ref Clk Input, Extended Interface Module label and status LEDs

Agilent N5322A Extended Interface Module for Active State Power Management Testing

Model: N5322A

Manufacturer: Agilent

In stock: 1

SKU: 5992 SF01

Condition: Used

Price: Sale price £382.50

Spectrum Instruments TM-4M 20350-004 complete kit with JDSU carry case, BNC cables, data cables, GPS antenna, and accessories

Spectrum Instruments TM-4M accessory BNC coaxial cables — black long, grey, white, and black medium with GPS antenna

Spectrum Instruments TM-4M Time & Frequency Reference System 20350-004

Model: TM-4M

Manufacturer: Spectrum Instruments

In stock: 1

SKU: 2647 2B03

Condition: Used

Price: Sale price £378.25

EXFO FTB-85970 CFP-to-CFP2 adapter angled top view showing EXFO label, S/N 841470, and TTInstruments product ID sticker

EXFO FTB-85970 CFP-to-CFP2 adapter side view showing gold edge connector, EXFO label, and TTInstruments product ID sticker

EXFO FTB-85970 CFP-to-CFP2 Adapter

Model: FTB-85970

Manufacturer: EXFO

In stock: 3

SKU: 5089 6G03

Condition: Used

Price: Sale price £212.50

Agilent Keysight 34153A PT100 RTD 4-Wire sensor elements in open box with TTInstruments product label

Keysight 34153A PT100 RTD sensor elements in anti-static ESD tray with pink foam — top view

Agilent Keysight 34153A PT-100/RTD 4-Wire Class Sensor Elements

Model: 34153A

Manufacturer: Agilent

In stock: 2

SKU: 4625 6C03

Condition: Used

Price: Sale price £42.50

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