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INFINITY® Scale Meter
- Discontinued -

INFINITY® Scale Meter
Selectable Scale Divisions
6 Digits
2 or 5 Coordinate Linearization of Input Signals
Four Isolated Open Collector Outputs
Wide Selection of dc Voltage and Current Ranges
Ratiometric Inputs
Tare-Fixed, Auto or Sequential
1.5 to 11 and 24 Vdc Sensor Excitation
Large Digital Offset Capabilities Enabling Easy Scaling in Engineering Units
Smart Filtering Detects the Difference Between a Spike or Process Change (Patent Applied For)
Selectable Decimal Point and Read Rates of up to 13 Readings/Sec
Peak and Valley Detection and Memory
Configurable Via Front Pushbuttons or Via RS-232 or RS-485

Four Form C Relays
Isolated Parallel BCD Output
Isolated Analog Output of 0-10 Vdc, 0-5 Vdc, 1-5 Vdc, 0-20 mA dc and 4-20 mA dc
Isolated Serial RS-232
Isolated RS-485, Addressable up to 199 Units

1 Year Warranty

Starting from Aug 1st 2018, INFW Series will be discontinued. As a possible substitute, please check out the INFS Series for details.

The INFW scale meter is a microprocessor-based indicator/ controller with enhanced features that allow you to easily configure the unit for virtually any application. It is compatible with most strain gage sensors such as load cells and pressure transducers.

The INFINITY® scale meter can be configured, via the five front-panel pushbuttons and/or the optional serial communications boards, to accept any of a variety of dc voltage ranges (some ranges plus unipolar or bipolar are first selected via a jumper located at the top of the instrument housing) and display them in engineering units.

Standard features include normal or sequential tare, peak or valley recall, tare limit, and a high resolution A/D converter with digital scaling and offset. Other features include dual relay or BCD output, isolated analog output, RS-232 or RS-484 serial communications options, auto or sequential tare, class selection, and display of units of measure. Self-diagnostics are performed automatically on power-up.

These meters provide both software and hardware lockout configurations which let you define the parameters, from setpoint adjustment to total reprogramming. Users can scale and offset their input signal into any engineering units desired. This is accomplished by the use of an exclusive two or five data point method of scale and offset for linearization of input signals transmitted from a sensor. The meter provides a choice of sensor excitations of 1.5 to 11 Vdc or 24 Vdc for sensors such as load cells, strain gages, and pressure transducers.

Weight Assemblies

TWA5 with Load Cell
TWA5 Weigh Assembly with Load Cell
Available from
OMEGA, Engineering, Inc.


Accuracy: ±0.005% rdg
Span Temperature Coefficient: ±15 ppm/°C
Step Response: 1 sec to 99.9%
Warmup to Rated Accuracy: 55 min
Operating Ambient: 0 to 50°C (32 to 122°F), 95%RH, non-condensing
Storage Ambient: -40 to 85°C (-40 to 185°F)
Power: 115 or 230 Vac, 49-400 Hz; 10 to 32 Vdc
Power Consumption:
6 W nominal, 10 W max.
Normal Mode Rejection: 60 dB
Common Mode Rejection: 120 dB
Common Mode Voltage: 1500 V peak per Hv test
Conversion: dual-slope technique
Reading Rate: 3/sec or 13/sec, 60 Hz; 3/sec or 12/sec, 50 Hz
Display: red or green 6-digit, 14-segment, 13.7 mm (0.54"); 4 alarm indicators
Dimensions: 48 H x 96 W x 165 D mm (1.89" x 3.78" x 6.5")
Panel Cutout: 45 H x 92 W mm (1.772" x 3.622"); 1/8 DIN
Weight: 574 g (1.27 lb)
TTL Outputs: four, isolated open collector; rated 150 mA at 1 V sink, 30 V open
BCD Output: isolated, tri-state, TTL/CMOS compatible; external 5 V supply for isolated; internal 5 V supply for non-isolated
Four Relay Option: dual 5 A relays and dual 3 A relays, form C, SPDT
Analog Output: 0-5 V/1-5 V/0-10 V/0-20 mA/4-20 mA, user selectable; 354 Vp isolation; 14-bit resolution; 0.1% accuracy, 50 msec step response
RS-232 Communications: 300/600/1200/2400/4800/9600/19.2k baud; RJ11 4-wire connection; complete program setup and message display capability; programmable to transmit current display, alarm status, min/max, actual measured input value and status
RS-485 Communications: 300/600/1200/2400/4800/9600/19.2k baud; RJ12 6-wire connection; addressable from 0 to 199
Voltage Input Ranges: 0-100 mV, 0-1 V, 0-5 V, 1-5 V, 0-10 V, 0-100 V, ±50 mV, ±500 mV, ±5 V, ±50 V
Current Input Ranges: 0-20 mA, 4-20 mA
Input Configuration: single-ended
Polarity: unipolar/bipolar, programmable
Span Adjustment: +0.00001 to 500,000, programmable
Offset Adjustment: 0 to 999,999 or 0 to -99,999; programmable
Sensor Excitation: 10 V at 30 mA for bridge; 24 V at 25 mA for loop power

To Order (*insert number code to complete model #) Prices Shown in U.S. Dollars
Basic Model
Power/ Display
Control Output
Analog Output
Serial Output
Input Signal
( * )
( * )
( * )
( * )
( * )
Strain gage/load cell panel meter
        115 Vac power, red LED display
        230 Vac power, red LED display
        115 Vac power, green LED display
        230 Vac power, green LED display
      Four NPN open collector transistors
      Isolated parallel BCD
      no longer available
      Two 5 A relays and two 3 A relays
    No analog output
    Isolated analog output
  No serial output
  Isolated RS-232
  Isolated RS-485
( * )
Specify range signal from chart below.*


Range Code
Range Code
Range Code
0-100 mV
0-10 Vdc
±5 Vdc
0-1 Vdc
0-100 Vdc
±50 Vdc
0-5 Vdc
±50 mVdc
0-20 mA
1-5 Vdc
±500 mVdc
4-20 mA

Blank Lens
9-pin RS-485 connector
Special Calibration
25-pin RS-232 connector
9-pin RS-232 connector
25-pin RS-485 connector
All dollar amounts on this site are shown in US currency.

 Part Number Builder
(1) (2) (3) (4) (5) (6) (7)
Option Descriptions
(1) Meter Type
INFW for SCALE meter
(2) Power and LED Color
0 for Designates 115 Vac power and red LED display
1 for Designates 230 Vac power and red LED display
2 for Designates 115 Vac power and green LED display
3 for Designates 230 Vac power and green LED display
4 for Designates 10-32 Vdc power and red LED display
5 for Designates 10-32 Vdc power and green LED display
(3) BCD and Control Outputs
0 for Four optically isolated open-collector outputs
1 for Isolated parallel BCD output (BCD1)
3 for Isolated dual 5 A and dual 3 A relays (REL4), not available with DC power
(4) Analog Output
0 for No analog output
1 for Isolated analog output (AN03)
(5) Serial Outputs
0 for No serial output
1 for Isolated RS-232 serial output (RS24)
2 for Isolated RS-485 serial addressable output (RS24)
(6) Input Options
DC1 for Process or Strain range 0-100 mV
DC2 for Process or Strain range 0-1 V
DC3 for Process or Strain range 0-5 V
DC4 for Process or Strain range 1-5 V
DC5 for Process or Strain range 1-10 V
DC6 for Process or Strain range 0-100 V
DC7 for Process or Strain range ±50 mV
DC8 for Process or Strain range ±500 mV
DC9 for Process or Strain range ±5 V
DC10 for Process or Strain range ±50 V
C1 for Process or Strain range 0-20 mA
C2 for Process or Strain range 4-20 mA
(7) Add-on Options
Nothing(leave field blank) for no options
,BL for Blank Lens
 NOTE: All combinations may not be valid, check spec sheet for valid part numbers.

Keywords: INFINITY® Scale Meter

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