28764 SDM8X50 Enclosure


The 28764 is a weather-resistant enclosure that is 10 inches wide and 12 inches tall with two conduits for cable entry. This enclosure houses and protects the SDM8X50 TDR multiplexer. When purchased with the –E option, the SDM8X50 ships with this enclosure and an enclosure supply kit.

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Benefits and Features

  • Weather resistant to protect instruments
  • Backplate designed so that Campbell Scientific components mount easily and securely
  • White, UV-stabilized enclosure reflects solar radiation—reducing temperature gradients inside the enclosure without requiring a separate radiation shield


Detailed Description

The backplate of the enclosure is prepunched with one-inch-on-center holes suitable for attaching the SDM8X50 multiplexer.

The 28764 is shipped with the 7363 Enclosure Supply Kit that consists of desiccant, a humidity indicator card, cable ties, wire tie tabs, putty, grommets, screws, and PVC coupling.

The 28764 has mounting hardware for mounting to a tripod mast or a user-supplied pole with a 1.25 to 2.1 in. diameter. The enclosure has two 1.5 in. diameter cable entry conduits on the underside of the enclosure. Multiple cables can be routed through each conduit. 


Color White
Construction Fiberglass-reinforced polyester enclosure with door gasket, external grounding lug, stainless-steel hinge, and lockable hasps
Enclosure Classification NEMA 4X (before being modified for cable entry)
Internal Dimensions 30.5 x 25.4 x 11.4 cm (12 x 10 x 4.5 in.)
External Dimensions 34.06 x 29.03 x 13.23 cm (13.41 x 11.43 x 5.21 in.)
Weight 4.1 kg (9.0 lb)


Mounting Poles

The 28764 is NOT compatible with the following mounting poles:

  • CM500
  • CM505
  • CM510
  • CM515

Frequently Asked Questions

Number of FAQs related to 28764: 2

  1. In applications where TDR probes are used to measure soil water content, the maximum distance from the TDR probe back to the TDR100/TDR200 (even through one or more multiplexers) cannot exceed 15 m (50 ft) when using RG58 coaxial cable; the CS605-L, CS630-L, and CS640-L TDR probes have an RG58 cable. When using low-loss coaxial cable, the distance cannot exceed ≈25 m (80 ft); the CS610-L, CS635-L, and CS645-L TDR probes have a low-loss coaxial cable.

    In slope stability and rock mass deformation applications, the maximum coaxial cable length should not exceed ≈1 mile (5,280 ft). The maximum combined length of all SDM cables in the system should not exceed ≈76 m (250 ft).

Listed Under

Replacement Part for the following products: