Vaisala MMT162 Technical data
www.vaisala.com
MMT162 Compact Moisture in Oil and
Temperature Transmitter for OEM Applications
Water activity
measurement
The MMT162 measures moisture in
oil in terms of the water activity (aw)
and temperature (T). Water activity
directly indicates whether there is
a risk of free water formation. The
measurement is independent of oil
type, age and temperature. The ppm
calculation for mineral oil based
transformer oil is optional in the
MM T162.
Several outputs - one
connector
The MMT162 has two analog
outputs that can be scaled and
the measurement ranges changed.
Additionally, the transmitter has an
The MMT162 enables on-line moisture monitoring in oils even in the most
demanding applications.
Features/Benefits
Continuous measurement of
▪
moisture in oil
Measures in lubrication,
▪
hydraulic and transformer oils
Excellent pressure and
▪
temperature tolerance
Vaisala HUMICAP® Sensor
▪
- proven in the field since 1973
Measures water activity
▪
- ppm-calculation available for
transformer oil
Small size, easy to integrate
▪
NIST traceable calibration
▪
(certificate included)
The Vaisala HUMICAP® Moisture
and Temperature Transmitter for Oil
MMT162 is an excellent economical
solution for reliable on-line detection
of moisture in oil.
Reliable Vaisala
HUMICAP® technology
The MMT162 incorporates the latest
generation of the Vaisala HUMICAP
Sensor. The sensor is developed for
demanding moisture measurement
in liquid hydrocarbons and has been
successfully used in oil applications
for over a decade. The sensor’s
excellent chemical tolerance provides
accurate and reliable measurement
over the measurement range.
®
RS-485 serial output. The signals and
the unit power travel in the same
cable.
An optional LED-cable enables a
visual alarm.
Compact, rugged
and intelligent
Due to its compact size, the MMT162
is quickly and easily installed in
tight spaces. Units are delivered fully
assembled, however, you can recongure them to suit your needs.
MM70
In combination with an MM70
indicator, the MMT162 provides an
ideal tool for on site calibration.
The MI70 indicator can be used as a
display, communication, and datalogging device for the MMT162.
Technical data
Measured Values
WATER ACTIVITY
Measurement range 0 ... 1 aw
Accuracy (including non-linearity, hysteresis and repeatability)
0 ... 0.9 ± 0.02
0.9 ... 1.0 ± 0.03
Response time
in oil flow (typical) <1 min (dry-wet)
MOISTURE
Calculated moisture content in ppm for mineral transformer oil
TEMPERATURE
Accuracy at +20 °C (+68 °F) ± 0.2 °C (0.36 °F)
Operating Environment
Operating temperature -40 ... +60 °C (-40 ... +140 °F)
Oil temperature -40 ... +80 °C (-40 ... +176 °F)
Pressure range
metal version up to 200 bar
plastic version up to 40 bar
Oil flow some flow recommended
Outputs
Analog outputs (two channels)
current output 0 ... 20 mA, 4 ... 20 mA
voltage output 0 ... 5 V, 0 ... 10 V
Alarm level indication by analog signal user selectable
Digital outputs RS-485
General
Sensor HUMICAP
Cable connections (2 ports) M8, 4 pin
Minimum operating voltage with
RS-485 output 14 ... 28 VDC
voltage output 16 ... 28 VDC
current output 22 ... 28 VDC
Supply current
normal measurement 20 mA + load current
External load for
voltage output min. 10 kOhm
current output max. 500 Ohm
Housing material
metal AISI 316L
plastic PPS + 40% GF
Mechanical connections with bonded seal ring (washer)
metal version G 1/2’’ ISO or NPT 1/2’’
plastic version G 1/2’’ ISO
Housing classification IP65 (NEMA 4)
Storage temperature range -40 ... +80 °C (-40 ... +176 °F)
Weight
with plastic housing 65 g (2.3 oz)
with metal housing 200 g (7 oz)
Complies with EMC standard EN61326-1, Electrical equipment
for measurement control and laboratory use - EMC requirements;
Industrial environment
Options and accessories
Stainless steel filter (standard) 221494SP
Stainless steel filter for high flow (>1 m/s) 221493SP
Connection cable for MM70 hand-held meter 219980
USB serial interface cable 219690
Sealing ring set (U-seal) ISO G1/2, 3 pcs 221525SP
Sealing ring set (copper) ISO G1/2, 3 pcs 221524SP
ISO 1/2’’ plug 218773
NPT 1/2’’ plug 222507
Sampling cell DMT242SC
Sampling cell w. Swagelok connectors DMT242SC2
Connection cable
2 m (6.5 ft), M8 snap-on 211598
0.32 m (1 ft) Shielded, M8 threaded HMP50Z032
3.0 m (9.8 ft), Shielded, M8 threaded HMP50Z300
5.0 m (16.4 ft), Shielded, M8 threaded HMP50Z500
10 m (32.8 ft), Shielded, M8 threaded HMP50Z1000
3 m, Shielded, connector 90° angle 221739
5 m, Shielded, connector 90° angle 221740
M8 threaded, Ch1 signal + Ch2 LED MP300LEDCBL
®
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
Ref. B210755EN-B ©Vaisala 2009
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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