Cable gland and conduit options - HMT370EX

HMT370EX User Guide

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User guide
The HMT370EX transmitter body has two M20x1.5 lead-throughs that can be fitted with cable glands, conduit fittings, and plugs, as required by your application. By default, the transmitter comes delivered with 2 different plug types on the transmitter lead-throughs as shown in Figure 1.
Figure 1. Default plugs in HMT370EX lead-throughs

Removable plastic transport cover: must be replaced (fold sides of transport cover together and pull out)

Metal sealing plug: can be used in final installation

The plastic transport cover (1) must always be replaced with an Ex compliant cable gland, conduit, or seal when wiring HTM370EX. The metal sealing plug (2) can be left in place and used in the final installation, if the right-hand lead-through is not used.

Cable glands, conduits, and plugs are available from Vaisala as accessories (listed in Table 1).
Table 1. Cable lead-through accessories
Accessory Vaisala item code
Cable gland M20 x 1.5 for Ø 5 … 11 mm cable 265207SP
Cable gland M20 x 1.5 for Ø 10 … 14 mm cable 265208SP
Conduit fitting M16 265243SP
Conduit fitting NPT1/2" 265240SP
Dummy plug (Ex, 2 pcs) 254931SP
CAUTION If you use lead-through accessories not ordered from Vaisala, note the following requirements:
  • The cable glands and cables used for wiring the device must not impair the Ex protection.
  • Unused lead-throughs must be sealed using Ex compliant plugs.
  • The glands and plugs must be water and dust tight (minimum IP rating: IP54).