Water activity measurement
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Measurement range aw
Accuracy
0 ... 0.9
0.9 ... 1.0
Sensor
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0 ... 1
±0.02
±0.03
Vaisala HUMICAP®
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Operating environment
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Operating temperature
for probes
for transmitter body
with display
Pressure range for probes
MMT332
MMT337
MMT338
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-40 ... +180 °C (-40 ... +356 °F)
-40 ... +60 °C (-40 … +140 °F)
+0 ... +60 °C (+32 … +140 °F)
0 ... 250 bar (0 ... 3625 psia)
0 ... 10 bar (0 ... 145 psia)
0 ... 40 bar (0 ... 580 psia)
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Complies with EMC standard |
EN61326-1:1997 + Am1:1998 + Am2:2001; Industrial Environment |
Inputs and outputs
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Operating voltage |
10 ... 35 VDC, 24 VAC |
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with optional power |
100 ... 240 VAC 50/60 Hz |
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supply module |
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Power consumption at
20 °C
(Uin 24VDC) |
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RS-232 |
max. 25 mA |
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Uout 2 x 0 ... 1V / 0 ... 5V /
0 ... 10V |
max. 25 mA |
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Iout 2 x 0 ... 20 mA |
max. 60 mA |
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display and backlight |
+20 mA |
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Analog outputs (2 standard, 3rd optional) |
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current output |
0 ... 20 mA, 4 ... 20 mA |
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voltage output |
0 ... 1 V, 0 ... 5 V, 0 ... 10 V |
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Digital outputs |
RS-232, RS-485 (optional) |
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Relay outputs |
0.5 A, 250 VAC, SPDT, Potential Free (optional) |
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Optional data logger with
real-time clock |
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Logged parameters |
max. three with trend/min/max values |
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Logging interval |
10 sec (fixed) |
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Max. logging period |
4 years 5 months |
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Logged points |
13,7 million points per parameter |
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Battery lifetime |
min. 5 years |
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Ethernet interface (optional) |
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Supported standards |
10/100Base-T |
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Connector |
RJ45 |
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Protocols |
Telnet |
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WLAN interface (optional) |
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Supported standards |
802.11b |
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Antenna connector type |
RP-SMA |
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Protocols |
Telnet |
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Security |
WEP 64/128,WPA |
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Authentication / Encryption |
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Open / no encryption |
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Open / WEP |
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WPA Pre shared key / TKIP |
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WPA Pre shared key / CCMP (a.k.a. WPA2) |
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Display
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LCD with backlight, graphic trend display of any parameter |
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Display menu languages |
English, French, Spanish, German, Japanese, Russian, Swedish, Finnish, Chinese |
Mechanics
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Probe cable length
Housing material
Housing classification
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Probe cable lengths 2 m, 5 m or 10 m
G-AlSi 10 Mg (DIN 1725)
IP 65 (NEMA 4X)
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Options and accessories
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Mounting kits
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Wall Mounting Kit
DIN Rail Installation Kit
Installation Kit for Pole or Pipeline
Mounting Rain Shield
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