Weschler Instruments – Manufacturer & distributor of measurement & control equipment
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Weschler Instruments is a manufacturer and distributor of electrical and electronic measurement equipment. Customers worldwide use our products in power plants, steel mills, chemical plants, paper mills and other industrial applications that require rugged, reliable and accurate instrumentation.
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Tri-Color Circular Bargraph Meters

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Tri-Color Circular Bargraph Meters

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The Weschler Instruments BG "TC", TriColor BarGraphs provide the quickest way to spot problems in your process control panels with bright changing colors. Each 50 segment LED (Light emitting diode) of the BG TC family has the ability to illuminate as Red (Danger), Yellow (Caution), or Green (Safe condition). The bar color identification can be changed by the user, from the front pushbuttons or through a tamper safe mode.
The Weschler BG Series Circular BarGraphs consist of model 241, 261 and 281. The panel footprint, shape and mounting meets direct retrofit applications for 4 1/2" and 8 3/4" switchboard meters, as well as 8" pressure gauge meters. The electronics housing remains the same. Quick identification of trouble conditions can help prevent equipment damage or production loss, thus reducing down time and maintenance costs, and improving operational safety. The fully programmable Weschler BG TC BarGraph™ fits the widest range of inputs and retrofits most edgewise switchboard and panel meters. Weschler's instruments satisfy the high quality standards set forth by the utility, OEM, and process control industries.

  • Large, high resolution 50 segment LED bar array
  • 5 digit display with resolution to 0.01%
  • Field programmable functions
    Zero and full scale point location, Setpoint type (Hi or Low), Hysteresis & latching, Setpoint time delay, 16 step dimming, Digital display for engineering units, Enable/disable front buttons, I.D. selection for communication, Bar form, Peak / Valley enable, Color zones, Over-range/Under-range flashing, Lamp test
  • Form-C relay outputs

  • Normally Open
    • 5A, resistive at 250V AC
    • 5A, resistive at 28V DC
    Normally Closed
    • 3A, resistive at 250V AC
    • 2A, resistive at 28V DC
  • Peak and Valley hold
  • Trend indication for signal direction
  • Communication RS232/485, SCADA, DCS
  • Analog retransmit
    4-20, 0-1mA DC
    1-5, 0-1, 0-5 V DC
  • Retrofit sizes for:
    GE/Yokogawa AB/DB 40, 4 1/2” and AB/DB 16 8 3/4 " switchboard meters; Crompton 075/07, 4 1/2" and 8 3/4" switchboard meters; Ashcroft, Heise 8" gauges; Dixson BW051/P; Weschler K241, K261
  • Versatile selection of inputs
    DC – Up to 5A & 250V
    AC – Up to 5A & 250V
    Thermocouple – J, K, T
    RTD – 10ohm Cu or 100ohm Pt
    Serial – ASCII
    Frequency – Line or mag pickup
    Process Control – V, mA


 width= Tri-Color Circular Bargraph Meters Brochure
(PDF, 302KB)

 width= Weschler Bargraph Selector Guide
(PDF, 147KB)