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SIMPSON ELECTRIC

Simpson Electric is a US-based manufacturer of electrical indicating and measurement instruments, with a product history dating to the early 20th century. The company is known for analog and digital panel meters, current transformers, shunts, and test leads used in industrial control, power monitoring, and test applications. 3G Electric supplies the Simpson Electric line globally, with stock and logistics support for plant engineers, maintenance managers, and procurement teams specifying replacement or new-build instrumentation.

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About SIMPSON ELECTRIC

Simpson Electric is a US-based manufacturer of electrical indicating and measurement instruments, with a product history dating to the early 20th century. The company is known for analog and digital panel meters, current transformers, shunts, and test leads used in industrial control, power monitoring, and test applications. 3G Electric supplies the Simpson Electric line globally, with stock and logistics support for plant engineers, maintenance managers, and procurement teams specifying replacement or new-build instrumentation.

The product families most relevant to industrial buyers include split-core current transformers, digital panel meters, and associated accessories. Simpson Electric split-core current transformers are available with primary current ratings from 100 A to 1,000 A, rectangular window shapes, and screw terminal connections. These are used for non-invasive AC current measurement, allowing installation around existing conductors without disconnecting the circuit. Digital panel meters in the Mini-Max and 2800 series provide DC voltage measurement with red LED displays, display spans such as -1,999 to 9,999 counts, and accuracy figures including ±0.1% of reading ±1 count, ±0.5% of reading ±2 counts, and ±1.0% of input ±5 counts depending on model. Input ranges include 0–200 V DC, and units are supplied with mounting brackets or instructions as applicable. Terminal connections are screw clamp type on the panel meters, and screw terminals on the current transformers.

These instruments are typically used in control panels, switchgear, motor control centers, and test benches where local indication or current transformation is required. The split-core design of the current transformers supports retrofit and maintenance work where cable disconnection is impractical. Panel meters are used for monitoring DC power supplies, battery systems, and process control loops. Simpson Electric products are specified by technical buyers who need defined accuracy, input ranges, and connection types rather than general-purpose indicators.

3G Electric supports the Simpson Electric line by holding inventory of the current transformer and panel meter models listed, providing part-number-level identification, and coordinating global shipping. The catalog includes manufacturer part numbers such as 37031, 37032, 37033, 37034, and 37035 for the split-core current transformers, and M23522120, M23522350, and 24503 for the panel meters. Buyers can request quotes against specific SKUs, and 3G Electric provides logistics support for international delivery. For procurement specialists, this means access to Simpson Electric instrumentation without requiring direct account setup with the manufacturer, and with the ability to consolidate orders across multiple product lines.

Common Applications

  • Electrical panel retrofits — Simpson Electric split-core current transformers (e.g., 37031, 37032) for adding current measurement without disconnecting existing conductors.
  • Motor control centers — Simpson Electric split-core current transformers (e.g., 37033, 37034) for monitoring branch circuit currents in AC systems.
  • DC power supply monitoring — Simpson Electric Mini-Max series digital panel meters (e.g., M23522120) for local indication of DC voltage with ±0.1% accuracy.
  • Battery and energy storage systems — Simpson Electric Series 2800 digital panel meter (24503) for 0–200 V DC monitoring on 120 V AC supply.
  • Process control panels — Simpson Electric Mini-Max True RMS panel meters (e.g., M23522350) for DC voltage indication in industrial control loops.
  • Test benches and calibration setups — Simpson Electric digital panel meters and split-core current transformers for measurement and verification tasks.

Guides & Resources

Frequently asked questions

Common questions about SIMPSON ELECTRIC from 3G Electric.

What primary current ratings are available in Simpson Electric split-core current transformers?

Simpson Electric split-core current transformers are available with primary current maximums of 100 A, 200 A, 400 A, 600 A, and 1,000 A. These correspond to manufacturer part numbers 37031, 37032, 37033, 37034, and 37035 respectively. All models in this range use a rectangular window shape and screw terminal connections. The split-core design allows the transformer to be opened and placed around an existing conductor without disconnecting the circuit, which is useful for retrofit or maintenance work. Selection depends on the maximum AC current expected in the conductor being monitored and the input requirements of the connected meter or monitoring device.

What is the accuracy of Simpson Electric Mini-Max series digital panel meters?

Mini-Max series DC voltage digital panel meters are available with different accuracy specifications depending on the model. For example, one model offers ±0.1% of reading ±1 count, while another provides ±0.5% of reading ±2 counts with True RMS measurement. Both have a red LED display and a display span of -1,999 to 9,999 counts. The meters include mounting brackets and use screw clamp terminal connections. Accuracy should be matched to the measurement requirements of the application; tighter accuracy is typically specified for calibration or reference monitoring, while general process indication may not require the same tolerance.

What input voltage range does the Simpson Electric Series 2800 digital panel meter support?

The Simpson Electric Series 2800 DC voltage digital panel meter (manufacturer part number 24503) measures from 0 V DC to 200 V DC. It has a 1,999 display span, a red LED display, and an accuracy of ±1.0% of input plus 5 counts. The meter operates on 120 V AC supply and uses screw clamp terminals. Instructions are included. This model is suited to monitoring DC power supplies, battery systems, or other DC circuits where a local digital indication is required and the input voltage stays within the 0–200 V DC range.

How are Simpson Electric split-core current transformers installed?

Simpson Electric split-core current transformers are installed by opening the core, placing it around the conductor to be measured, and closing it around the cable. This avoids disconnecting the conductor, which is an advantage in live or hard-to-isolate circuits. The secondary connections are made via screw terminals. The rectangular window shape accommodates common cable or busbar sizes. Correct orientation and tight closure of the core are necessary for accurate current transformation. These transformers are intended for AC current measurement and should be matched to the meter or relay input they feed.

What is the difference between Simpson Electric Mini-Max and Series 2800 panel meters?

The Mini-Max series and Series 2800 are both DC voltage digital panel meters with red LED displays, but they differ in display span, accuracy, and supply requirements. Mini-Max models have a display span of -1,999 to 9,999 counts and are available with accuracies such as ±0.1% of reading ±1 count or ±0.5% of reading ±2 counts with True RMS. The Series 2800 model has a 1,999 display span, ±1.0% of input plus 5 counts accuracy, and operates on 120 V AC. Both use screw clamp terminals and include mounting brackets or instructions. Selection depends on required resolution, accuracy, and available supply voltage.

Can 3G Electric supply Simpson Electric current transformers and panel meters globally?

Yes. 3G Electric supplies Simpson Electric products worldwide, including split-core current transformers and digital panel meters. The catalog lists specific manufacturer part numbers and SKUs for each item, and buyers can request quotes against those identifiers. Logistics support is provided for international shipments. For procurement teams, this allows sourcing Simpson Electric instrumentation through a single supplier alongside other industrial equipment lines. Availability and lead times vary by part number, so it is advisable to confirm stock and shipping details at the time of quotation.