cx101 lcd panel meter brands

I"d like to build a constant current load like the one in Dave"s video (#102) and am stymied by the panel meter he uses. It"s a CX101 (presumably the BG version that works with common ground). But this thing doesn"t seem to exist anywhere. I found one site that claims to sell them, but it"s not a site I know (https://www.circuitspecialists.com/lcd-panel-meter-cx101bg.html). Is this thing discontinued? If so, are there alternatives that would do the job?

I can"t seem to find a reasonably priced panel meter that"ll read in the appropriate range (from 0 to "less than 2V"). All the stuff on digikey seems to either have a non-zero low-voltage or it seems to be on the expensive side (in the $30 range and up).

This particular panel meter is reliable and of reasonable quality. Best of all is it’s low cost. It is a 3 1/2 digit meter with decent accuracy for the price.

There are a number of flavors for this meter and choice is application dependant. The CX101A & CX101B are designed to be used with an independent (isolated) ground. The signal being measured does not share a common ground with the supply voltage for the panel meter.

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Distributor of digital panel meters for pharmaceutical, petroleum, agricultural, government, food and beverage industries. Types include large display process, temperature, high voltage DC, serial input, strain gage, 3 1/2, 4 1/2 and 5 digit loop powered panel meters. Available in 4 to 20 mA input current, various input voltages, power supplies, operating temperatures, LED or LCD display heights and voltage drops. Suitable for water, wastewater, natural gas, power generation, metal milling, transportation, plastic forming, packaging, compressor, pump, OEM, research and development applications. Some panel meters are CE certified, CSA approved and UL listed.

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A method of measurement ac signals using a rectifier circuit. Average responding meters are suitable for measuring only sinusoidal waveforms. Significant errors can result when they are used to measure irregular waveforms.

An instrument used for measuring a wide variety of voltage or current waveforms and converting the measured value to a numeric or alphanumeric display. Most digital panel meters employ either LCD (liquid crystal) or LED (light emitting diodes) as the display element.

For LED and LCD based panel meters, the number of numeric characters that can be displayed. For example, a four-digit panel meter can display inputs with a maximum resolution of 9999.

Internationally recognized unit of measure for frequency. A one Hertz waveform repeats itself every second. AC line frequency meters usually display Hertz in 0.1 or 0.01Hz resolutions.

An alphanumeric digital display employing a ‘liquid crystal’ material, sandwiched between two layers of glass. LCD displays typically require a minimum level of ambient light in order to be visible. However, backlit LCD displays can be viewed in total darkness.

An electrical measuring instrument designed to measure and display applied dc or ac voltages. Its physical design allows it to be easily mounted in instrumentation panels. Panel meters can be digital (with alphanumeric displays) or analog (with moving pointers).

A panel meter specifically designed to convert industrial signals such as 4-20mA current loops or 0-5Vdc into physical parameters (weight, pressure, temperature, etc.). Process monitors typically include potentiometers for adjusting input signal offsets and span.

Programmable Logic Controllers, or PLCs, find widespread uses in industrial control applications. Digital panel meters can be used to visually display a PLC’s analog outputs (4-20mA, 0-5V, etc.).

‘rms’ stands for “root-mean-square”. The true rms value of a voltage or current waveform is a measure of its potential power or heating effect. Unlike their average responding counterparts, true rms reading panel meters can accurately measure the value of non-sinusoidal waveforms (step, triangle, square, etc.).

Well known abbreviation for ‘Underwriters Laboratories’. Underwriters Laboratories is an internationally recognized safety testing organization. AC-powered panel meters are typically required to pass stringent UL testing before they are allowed to carry the UL mark.

A category of digital panel meters designed to be powered directly from the signal they are measuring and, as their name implies, only require two wires.

A digital meter designed to measure varying analog voltages within the fixed ranges of either 0 to 5Vdc, or 0 to 10Vdc. These types of process meters (or monitors) are used in industrial applications.