RIU3: tank-side display & control

The Remote Interface Unit (RIU3) displays sensor measurements for localized monitoring and control. 

Each RIU has two internal relays. The relays can be programmed to send alarms or control a device (e.g. a solenoid valve for oxygen control).

Standard probe options:

  • OxyGuard Commander galvanic DO/Temp probe
  • In-Situ optical RDO Pro-X or RDO Blue probe
  • OxyGuard DO probe
  • OxyGuard precision temperature probe
  • Sensorex differential pH Sensor
  • OxyGuard salinity meter
  • Sensorex differential ORP Sensor
  • Float switch – stainless steel
  • Hydrostatic pressure transmitter, 0-250mbar
  • Sensorex flat surface pH electrode + adapter

TECHNICAL SPECIFICATIONS

Power

12-24VDC,  120mA

Sensor Power

Onboard isolated 24VDC loop power supply

Input

Probe input (optically isolated) (4-20mA, 0-5V, digital on/off, MODBUS RS-485)

Display

8×2 Character, Large Font, LED Backlit

Relay Output

Two SPDT 10 Amp relay-user configurable, LCD/LED Alarm Indicator

Digital Output

MODBUS RTU RS485 communication port, Network addressable

Environmental

NEMA 4X / IP65, Sealed Cable Grips

Temperature

-5 °C to +60 °C – Operation/Storage
-10 °C to +60 °C – Storage

Relative Humidity

5% to 85% RH at up to +40 °C – Operation
5% to 40% RH above +40 °C up to +60 °C – Storage

Altitude

Up to 3,000 meters ( 10,000 feet ) – Operation/Storage

Dimensions

125mm x 145mm x 75mm   (4.9” x 5.7” x 3”)

Weight

457 grams (1 lbs)

Accessories

Wall mount bracket