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680HE Synergy Series Hostile Environment Digital Weight Indicator

680HE Synergy Series Hostile Environment Digital Weight Indicator

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Rice Lake's 680HE hostile environment weight indicator is made to withstand the unique demands of corrosive environments. Ideal for the agriculture industry, fertilizer production and transfer, as well as other applications with a high concentration of corrosive substances such as chlorine, the 680HE uses an FRP enclosure and IP66 rating for the highest level of protection. 

The bright 2.5-inch, six-digit display makes it easy to view weight from a distance in any lighting condition. The large display size and local/remote capability give the 680HE the option to be used as a secondary display. Configure display color as red or green for enhanced visibility that best suits the application. 

The 680HE supports multiple communication options for connecting to multiple devices such as printers and PCs. The full numeric keypad makes tare entry easy, and four digital I/O points are available for basic weightbased control of interfaced equipment.


  • Bright six 2.5in tall, seven-segment two color LED display

  • Battery backed time and date

  • Full numeric keypad

  • Three serial ports: two RS-232, one full duplex RS-485

  • Numeric keyed entry allowed for tare and setpoint entry

  • Formattable tickets

  • Ethernet TCP/IP

  • USB device

  • IP66 FRP enclosure

  • Four onboard configurable digital I/O points, TTL logic


Line voltages: 100-240 VAC, 9-36V DC
Frequency: 50-60 Hz

Power Consumption:
12W (AC) with one 350 ohm load cell, 30W max

Excitation Voltage:
10 VDC (± 5 VDC)

Analog Signal Input Range:
-0.5 mV/V to +7 mV/V

Analog Signal Sensitivity:
1 μV/graduation recommended

A/D Sample Rate:
6.25-120 Hz, software selectable

Internal: 8,000,000 counts
Display: 100,000

System Linearity:
Within 0.01% full scale

Digital I/O:
Four configurable I/O - 5V logic

Communication Ports:
Two RS-232 (three-wire)
RS-485/422 (five-wire)
Micro USB (device)
Ethernet TCP/IP (10/100)

Status Annunciators:
Eight LED annunciators

Six 2.5 in tall, seven-segment digits

Flat membrane panel, tactile feel
(18 buttons)

Temperature Range:
Legal: 14°F to 104°F (-10°C to 40°C)
Industrial: 14°F to 122°F (-10°C to 50°C)

EMC Immunity:
10 V/m

7.9 lb (3.5 kg)

Rating: IP66
Material: FRP

Two-year limited warranty

NTEP CC 19-021, Class III/IIIL, 10,000d
Measurement Canada
UL/cUL Listed
CE Marked

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