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
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)
LCD with backlight, graphic trend display of any parameter
English, French, Spanish, German, Japanese, Russian, Swedish, Finnish

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