The Vaisala HUMICAP® Humidity and Temperature Transmitter HMT338 is designed for pressurized processes. The HMT338 incorporates Vaisala’s more than 30 years of experience in industrial humidity measurement. The sensor provides accurate and reliable measurement and is immune to particulate contamination and most chemicals.
- Installed through ball valve – can be inserted and removed while the process is running
- Adjustable probe depth
- Pressure tolerance 40 bar
- Two probe lengths available
Insert or remove probe while the process is running
With “hot tapping”, the probe is inserted directly into the process while it is running, without the need for venting or lowering the process pressure. The probe is screwed into a ball valve assembly that has been fixed to the process pipe or wall. The adjustable hex nut is hand-tightened to temporarily hold the probe to the process. Then the probe is pushed down to the appropriate depth. The hex nut is tightened with a wrench to lock the probe in its place. Hot tapping is possible in pressures up to 10 bar.
Graphical display of measurement trends
From the display, the user can easily monitor operational data, measurement trends and one-year measurement history. The optional data logger with real-time clock makes it possible to generate more than four years of measured history, and zoom in on any desired time or time frame. The battery backup of the real-time clock guarantees a reliable logging of measured data.
Temperature measurement range: -70 ... +180 °C (-94 ... +356 °F)
Ball valve set BALLVALVE-1
Pressure fitting ISO 1/2 to NPT 1/2 210662
PC software + cable 215005
USB-RJ45 Serial Connection Cable 219685
Connection cable for HM70 211339