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TruMeter 8781-1


The 878X is capable of displaying and controlling almost any count application. It has a dual relay output, which can be used to signal or control external devices or processes.

Order #: 8781-1

Mfg Part #: 8781-1

$430.00 USD

Usually ships in 7-10 days

Free shipping over $250

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Overview :

Product Highlights

  • 14.2mm character high visibility LED display
  • 1/8 DIN (96mmX48mm) bezel
  • Simple user programming
  • Display scaleable to show engineering units
  • Programme lock out facility
  • AC and DC powered models available
  • Analogue re transmission option
  • RS485 communications option
  • CE approved. (UL and cUL pending)
  • PDF Instructions


  • Power Supply: AC Powered 85-265VAC 47-63Hz 20VA and DC Powered 9-30VDC 12VA
  • Sensor supply: 12VDC ±12% 75mA max
  • Display: 14.2 mm character high visibility LED Display
  • Signal Input: Sink(NPN) or Source(PNP) DIP switch selectable
  • Threshold: High 3.5 to 28VDC and Low 0-1.9VDC for single ended signals
  • Magnetic pick up range: 200mV pk-pk to 65VRMS into 34.9 kO load
  • Slow response: 200Hz max
  • Fast response: 8.25kHz A or B, 3Khz A and B, QuadX1 and QuadX2 3.25kHz, QuadX4 2Khz
  • Control Inputs: Sink(NPN) only (4.75kO to +5VDC) internal load
  • Threshold: High 3.5 to 28VDC and Low 0-1.9VDC
  • Response time: 25msecs max (5V signal)
  • Relay output: 2 SPCO (Form C) relays. Contact rating 5A 250VAC or 30VDC @ unity power factor
  • Analogue retransmission: 4-20mA (<750O load ) and 0-10VDC (> 2500O load)
  • RS485 Serial Communication
  • Baud rate 1200, 2400, 4800, 9600 or 19,200 programmable Parity Even, odd or no parity.
  • Address: 00-99
  • Data Retention: EEPROM 100years duration
  • Operating Temperature: 0°C to 50°C
  • Storage Temperature: -20°C to 70°C
  • Humidity: 0 to 85%RH non condensing
  • Vibration: 2.5g's 30-200Hz
  • Shock: 30g's
  • Front Panel Protection: IP65 when properly mounted using gasket supplied.
  • CE approved. (UL and cUL pending)

Ordering information

  • 8780 DC Powered Predetermining Counter
  • 8781 AC Powered Predetermining Counter
  • Options – (Select & add to code 8780-?)
    • 0 for No Options
    • 1 for Dual Relay
    • 3 for Dual Relay & Analogue Output
    • 5 for Dual Relay & RS485 Comms
    • 7 for Dual Relay, Analogue Output & RS485 Comms
    • e.g. 8780-1 = DC Powered Predetermining Counter with Dual Relay Option Board Fitted