Water activity measurement

Measurement range a_w
Accuracy
     0 ... 0.9
     0.9 ... 1.0
Sensor

0 ... 1

±0.02
±0.03
Vaisala HUMICAP^®

Operating environment

Operating temperature
     for probes
     for transmitter body
     with display
Pressure range for probes
     MMT332
     MMT337
     MMT338
Complies with EMC standard

-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)
EN61326-1:1997 + Am1:1998 + Am2:2001; Industrial Environment

Inputs and outputs

Operating voltage
     with optional power supply module
Power consumption @ 20 °C
(U_in 24VDC)
     RS-232
     U_out 2 x 0 ... 1V / 0 ... 5V / 0 ... 10V
     I_out 2 x 0 ... 20 mA
     display and backlight
Analog outputs
(2 standard, 3rd optional)
     current output
     voltage output
Digital outputs
Relay outputs
Optional data logger with
real-time clock
     Logged parameters
     Logging interval
     Max. logging period
     Logged points
     Battery lifetime
Display

Display menu languages

10 ... 35 VDC, 24 VAC
100 ... 240 VAC 50/60 Hz


max. 25 mA
max. 25 mA
max. 60 mA
+20 mA


0 ... 20 mA, 4 ... 20 mA
0 ... 1 V, 0 ... 5 V, 0 ... 10 V
RS-232, RS-485 (optional)
0.5 A, 250 VAC, SPDT, Potential Free (optional)


max. three with trend/min/max values
10 sec (fixed)
4 years 5 months
13,7 million points per parameter
min. 5 years
LCD with backlight, graphic trend display of any parameter
English, French, Spanish, German, Japanese, Russian, Swedish, Finnish, Chinese

Mechanics

Probe cable length
Housing material
Housing classification

Probe cable lengths 2 m, 5 m or 10 m
G-AlSi 10 Mg (DIN 1725)
IP 65 (NEMA 4X)

Options and accessories

Mounting kits

Wall Mounting Kit
DIN Rail Installation Kit
Installation Kit for Pole or Pipeline
Mounting Rain Shield