Water activity measurement

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

0 ... 1

±0.02
±0.03
Vaisala HUMICAP^®

Temperature measurement

Measurement range
Accuracy at +20 °C
Sensor

-40 ... +180 °C
± 0.1 °C (± 0.18 °F)
Pt 100 IEC 751 1/3 class B

Operating environment

Temperature (electronics)
Storage temperature
Pressure range for MMT318 with ball valve up to 120 °C
Pressure range for MMT317

-40 ... +60 °C (-40 ... +140 °F)
-55 ... +80 °C (-67 ... +176 °F)

0 ... 40 bar
0 ... 10 bar

Inputs and outputs

Operating voltage U_in
Power consumption @ 20 °C, U_in = 24 VDC with RS-232C
Two analog outputs,
selectable and scalable
Serial output

24 VDC (10 ... 35 VDC)

20 mA

0 ... 20 mA or 4 ... 20 mA
RS-232C

Mechanics

Probe cable length
Material
     transmitter housing
     transmitter base
Housing classification

2, 5 and 10 m

G-A1Si10Mg
ABS/PC
IP65 (NEMA 4)

Calibration services

Calibrated quantities
Traceability

relative humidity, temperature
NIST

Calibration services are available at Vaisala service centers for a fixed price.
-Factory calibrations (ISO9001)

Calibration price includes:
-calibration and certificate before adjustment
-adjustment to meet specifications
-calibration and certificate after adjustment
-replacement of wearing parts

Spare parts

Common spare and wearing parts are available. For availability contact sales.

Repair

Repair services are available at Vaisala service centers for a fixed price.

Repair price includes:
-repair work
-required parts
-calibration certificate
-service report

Technical support

Technical support for your installed units, contact helpdesk@vaisala.com.