DMP8 probe - DMP5 - DMP6 - DMP7 - DMP8 - DMPX

DMP Series User Guide

Document code
M212357EN
Revision
D
Language
English
Product
DMP5
DMP6
DMP7
DMP8
DMPX
Document type
User guide
Figure 1. DMP8 dimensions

Vaisala DRYCAP® Dew Point and Temperature Probe DMP8 is designed for industrial low-humidity applications such as industrial drying, compressed air systems, and semiconductor industry. It can be installed in a 1/2" NPT or ISO thread with adjustable insertion depth.

  • Operating temperature of probe head −40 … +80 °C (−40 … +176 °F)
  • Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
  • Operating pressure of probe head 0 … 4 MPa (0 … 40 bar)

An optional ball valve kit allows for inserting or detaching the probe from a pressurized line.

For more information on using the probe with the ball valve, see Ball Valve Kit (BALLVALVE-1) Installation Guide (M212837EN).

Figure 2. DMP8 probe head
1
Clasp nut, 24 mm hex nut
2
Fitting body, 27 mm hex head
3
Leak screw (on ISO 1/2" fitting body HM47432 only)
Fitting body with a leak screw can be useful when the probe head cannot be installed directly in the pressurized process or process pipe. The leak screw allows a small sample flow to escape from the process out to atmospheric pressure, enabling a fast response time although the probe is not installed in the process.
Figure 3. Sealing of fitting body into process
1
Fitting body with 24 mm hex nut and tapered thread
2

Seal with a suitable thread sealant. For example, LOCTITE® No. 542 with activator No. 7649, MEGA-PIPE EXTRA No. 7188, or PTFE tape.

Follow the instructions of the sealant manufacturer.

PTFE tape does not lock the parts together. Use two fork wrenches (24 mm and 27 mm) when tightening and opening the clasp nut of the probe.