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www.vaisala.com
HMT300TMK Turbine Mounting Kit for Power
Turbine Intake Air Measurement
cause errors in measurement. The
patented warmed probe prevents
condensation from forming on the
sensor.
Protective enclosure
The HMT300TMK includes a white,
painted aluminum enclosure with
an installation kit for the probe. The
HMT337 Humidity and Temperature
Transmitter is installed in the
aluminum enclosure at the factory.
The instrument can be equipped to
be powered with either 24 VDC/VAC
or with an internal 110/230 volt power
supply unit.
The outer cover protects the
transmitter from direct sun light and
The Vaisala HUMICAP® Turbine Mounting Kit HMT300TMK is shown with the cover
open.
The Vaisala HUMICAP® Turbine
Mounting Kit HMT300TMK is
developed to monitor the air intake of
gas and liquid fueled power turbines.
It is ideal for measuring in water
vapor injection applications because
Features/Benefits
Designed for high humidity
▪
applications
Measurement range:
▪
-40 ... +100°C
Patented, warmed probe
▪
Incorporates Vaisala HUMICAP®
▪
Sensor for excellent accuracy
and long-term stability and
resistance to dust and most
chemicals
Low maintenance need
▪
Outer cover provides
▪
protection from rain and
direct sunlight
NIST traceable
▪
(certificate included)
the sensor has been optimized for
high humidity environments by
utilizing a patented, warmed probe.
Water vapor is added to the intake of
the turbine to increase the mass flow
which in turn increases compression
and electrical power output.
Low maintenance
Power turbines also require exact
water vapor injection in the chamber
to reduce pollutant emissions.
Vaisala’s warmed probe technology
is ideal because of its reliability in
the field. In fact, the only suggested
scheduled maintenance is annual
calibration.
Patented, warmed probe
prevents condensation
The HMT300TMK with the HMT337
installed, provides fast and reliable
dewpoint measurement especially
under high humidity conditions
where dew would normally form on
the humidity sensor and thereby
rain. The installation kit protects the
probe from outer water splashes,
keeps the sensor dry, and prevents
any parts that could vibrate loose
from entering the turbine.
The HMT300TMK can be ordered
separately for installation with the
customer’s existing HMT337.
HUMICAP® performance
The HMT330 Series Transmitters are
fitted with the latest generation of
the HUMICAP
known for its accuracy, reliability and
long-term stability. The sensor has a
high tolerance for particulate abrasion
and chemical contamination.
®
, the polymer sensor
Vaisala HUMICAP®
Humidity and Temperature
Transmitter HMT337
The HMT337 is intended for
demanding industrial humidity
measurement applications with a
risk of condensation. The stainless
steel probe is mechanically durable
and preferred for most industrial
applications.
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Technical data
91.5 (3.6)
165.3 (6.51)
354.9 (13.97)
488 (19.21)
193 (7.6)
254 (10)
203 (8)
441.5 (17.38)
144.5 (5.69)
101.6 (4)
100 (3.94)
100 (3.94)
Ø
13 (0.51)
Dewpoint temperature
Measurement range -40 ... +100 °C (-40 … +212 °F)
Accuracy: find the intersection of the dewpoint temperature
curve and the dewpoint difference reading (process temperature
- dewpoint temperature) on the x-axis and read the accuracy in
dewpoint measurement at the y-axis
Response time (90 %) at +20 °C (68 °F)
in still air (PPS grid with steel netting) 20 s
®
Sensor HUMICAP
180C
Dimensions
Dimensions in mm (inches)
General
Connections screw terminals for 0.5 mm2 wires (AWG 20),
stranded wires recommended
Operating voltage 24 VDC/VAC (20...28 V) or 115/230 VAC
(Must be specified at time of order)
Recommended external load for current outputs < 500 ohm
0...1 V output > 2 kohm (to ground)
0...5 & 0...10 V outputs > 10 kohm (to ground)
Operating temperature range for
electronics -40...+60 °C (-40 ... +140 °F)
Storage temperature -55...+80 °C (-67 ... +176 °F)
Housing material G-AlSi10 (DIN 1725)
Housing classification IP65 (NEMA 4)
Bushing 8...11 mm diameter cables
(0.31 ... 0.43 inch)
Humidity sensor protection (Ø 12 mm) PPS grid with steel netting
Electromagnetic compatibility Complies with EMC standard
EN61326-1, Industrial Environment
Outputs
Two standard outputs, third optional 0...20 mA, 4...20 mA,
0 ... 1 V, 0...5 V, 0 ... 10 V
Typical accuracy of analog output
at +20 °C (+68 °F) ±0.05 % full scale
Typical temperature dependence
of analog output ±0.005 %/°C full scale
Serial output available RS232C (optional RS485)
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
HUMICAP® is a registered trademark of Vaisala.
Ref. B210680EN-B ©Vaisala 2010
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
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