The Extech TL833 Industrial Test Lead Set is an 11-piece kit assembled around CAT III-1000V rated components for industrial electrical measurement work. The kit combines the TL726 double molded silicone test leads, TL740 industrial plunger style test clips, TL741 heavy duty plunger style hook clips, TL708 large alligator clips, TL743 slim reach test probe set, and a Type K bead probe with banana adaptor, all stored in a pouch case. The broader Extech TL-Series datasheet also covers companion kits (TL841, TL831) and individually available probes and clips that share the same connector standards and safety ratings.

The TL833 and its companion kits are designed for industrial electrical work that requires CAT III-1000V or CAT IV-600V rated test accessories. The component mix in each kit reflects the variety of connection points encountered in field service: shrouded banana plugs into meters, plunger-actuated jaws that grip terminals and wire, hook clips that capture component leads, alligator clips for solid mechanical hold on fine wires, and slim reach probes for piercing insulation. The Type K bead probe with banana adaptor extends a CAT III-1000V rated meter into temperature measurement when the user has a compatible meter input.

ValueTronics International, LLC stocks, tests, and ships professional test and measurement accessories from our 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. We are an authorized Extech distributor, and our team handles each accessory order, kit, and replacement probe individually, applying the same verification and packaging discipline regardless of order size. The result for the buyer is a direct relationship with a supplier who knows the product line, can answer questions about specific kit contents and individual component availability, and stands behind every shipment.

Brand Heritage

Extech Instruments operates as part of FLIR Systems, which itself became part of Teledyne Technologies in 2021. The Extech brand has been maintained under each successive parent for its established position in handheld test instruments and accessories.

Compare Other Models in This Series

The Extech TL-Series covered on this datasheet spans complete pre-configured kits and individual replacement components. The TL833 (11-piece industrial kit), TL841 (16-piece multi-configuration kit), and TL831 (12-piece master kit) are the three primary kit-level products, each assembling a different selection of probes, clips, and leads in a pouch case. The individual components — TL726 silicone leads, TL740 plunger clips, TL741 hook clips, TL742 pincer grips, TL743 slim reach probes, TL744 flat blade probes, TL747 sharp probes, TL748 hook tip probes, and the TL708/TL709 alligator clip sets — are also available separately as replacements or for users who want to build a custom accessory set.

The kits differ in piece count and component mix rather than in safety rating tier. All three kits and their individual components are rated CAT III-1000V, with most components also carrying CAT IV-600V ratings as noted on the datasheet. The choice between kits is therefore driven by the connection points the user expects to encounter rather than by voltage category — TL833 emphasizes plunger-style clips and slim reach probes for industrial electrical work, TL841 emphasizes interchangeable tip configurations for varied bench and field work, and TL831 emphasizes a master assortment combining silicone leads with electronic sharp probes and multiple clip styles.

Each new kit and individual probe shown on the comparison table below is its own product page with condition-matched pricing. Pouch case kits and individual components both move through the same verification process before shipping.

The TL833 specifically pairs the TL726 silicone leads with industrial-grade gripping accessories — TL740 plunger clips for terminal work, TL741 hook clips for component leads, TL708 large alligator clips for wire bundles, and TL743 slim reach probes for accessing densely-packed connection points. The Type K bead probe with banana adaptor adds basic temperature measurement capability when the user has a compatible meter.

The principal differences across the three kits are component selection and total piece count. TL833 (11 pieces) is the industrial electrical kit. TL841 (16 pieces) is the largest and includes spade lugs and right-angle leads in addition to standard probes and clips. TL831 (12 pieces) is the master kit that includes the TL747 electronic sharp probe set for high density component work alongside the standard industrial accessories.

Individual replacement components are documented on the same datasheet for users who already own a kit or want to assemble a custom set. The TL744, TL747, and TL748 probe sets are available individually; the TL708 and TL709 alligator clip sets are also available separately in large and medium sizes.

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Product Core & Specifications

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