Transmitter structure - DMT152

DMT152 User Guide

Document code
M210865EN
Revision
K
Language
English
Product
DMT152
Document type
User guide

When the transmitter is delivered, the filter is protected by a yellow transport protection cap that keeps the sensor dry. The transport protection cap should be left on the transmitter during storage. Remove the transport protection cap before installing the transmitter.

The transmitter body does not have user serviceable parts inside, and is not designed to be opened. Opening the transmitter will void the warranty.

Figure 1. DMT152 probe parts
1

4-pin M8 connector I: analog output channels and operating power

2
4-pin M8 connector II (shown with protective cap): digital output (RS-485) and operating power
3

Tightening nut (30 mm)

4
Connection thread, alternatives:
  • ISO G1/2"
  • NPT 1/2"
  • UNF 3/4"-16 2A
  • UNF 5/8"-18
5
DRYCAP sensor protected with stainless steel mesh filter (see Changing the filter)

When installing a DMT152 transmitter with ISO or UNF thread, use a sealing ring to achieve a tight installation. Three copper sealing rings are provided with the transmitter, and more can be ordered from Vaisala. Note that the sealing rings for ISO and UNF threads are different. See Spare parts and accessories.

Do not use a sealing ring with the NPT thread. Instead, seal the thread using PTFE tape or PTFE sealant paste.