# Cal Test Electronics CT4072 100 MHz Differential Probe

# Cal Test Electronics CT4072 100 MHz Differential Probe

## Key Features At A Glance

-   100 MHz (-3 dB) active differential probe with high input impedance and low input capacitance
-   Switchable attenuation settings of 100x, 200x, 500x, and 1000x
-   Maximum input up to ±3500 V (DC + AC peak) at the 1000x setting
-   ±2% accuracy (based on a DMM with 10 MΩ input impedance)
-   AC CMRR of 80 dB @ 60 Hz, 60 dB @ 100 Hz, and 50 dB @ 1 MHz
-   Differential input impedance of 54 MΩ // 1.2 pF; 27 MΩ // 2.3 pF each side to ground
-   Power indicator LED with included 9 V power adapter
-   Meets IEC 61010-1 CAT II safety standard; Pollution Degree 2

The CT4072 is an active differential probe with a 100 MHz bandwidth, built around a high input impedance and low input capacitance. It measures the voltage difference between two points across a wide input range that extends up to ±3500 V (DC + AC peak), and it is compatible with oscilloscopes from all major manufacturers.

A differential probe lets an engineer measure the voltage between two arbitrary nodes that are both floating relative to ground, without referencing the oscilloscope's chassis ground. The CT4072 supports a wide variety of measurements across its input range, with switchable attenuation of 100x, 200x, 500x, and 1000x so the probe can be matched to the amplitude of the signal under measurement.

ValueTronics stocks and holds its own inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois.

## Accessories Supplied

-   Differential probe
-   (2) High voltage hook probes
-   (2) Alligator clips
-   (2) 4 mm probes
-   (2) Retractable, sheathed 4 mm banana plug test leads, silicone jacketed
-   (1) Insulated BNC cable
-   (1) 9 V power adapter

## Product Core & Specifications

Specification

Value

Electrical Characteristics

Bandwidth

100 MHz

Rise Time

18 ns for 200x, 500x, & 1000x; 25 ns for 100x

Attenuation

100x, 200x, 500x, 1000x

Accuracy

±2% \*

AC CMRR

80 dB @ 60 Hz; 60 dB @ 100 Hz; 50 dB @ 1 MHz

Maximum Input Voltage (100x) (DC + AC peak)

±350 V

Maximum Input Voltage (200x) (DC + AC peak)

±700 V

Maximum Input Voltage (500x) (DC + AC peak)

±1750 V

Maximum Input Voltage (1000x) (DC + AC peak)

±3500 V

Absolute Maximum Rated Input Voltage (each side to ground)

2500 Vrms

Input Impedance (Differential)

54 MΩ // 1.2 pF

Input Impedance (each side to ground)

27 MΩ // 2.3 pF

Output Voltage Swing

±8 V (driving 1 MΩ oscilloscope input)

Offset (typical)

±5 mV

Noise (typical)

2 mVrms

Source Impedance

50 Ω

Power Supply

9 V power adapter (included)

Mechanical Characteristics

Weight (probe only)

280 g

Dimensions

240 x 80 x 30 mm

BNC Cable Length

100 cm

Input Leads Length

55 cm each

Environmental Characteristics

Operating Temp/Humidity

0°C to 50°C / 10% to 85% RH

Storage Temp/Humidity

\-30°C to 70°C / 10% to 90% RH

Pollution Degree

Pollution Degree 2

Safety Specifications

Safety Standard

IEC 61010-031:2015 CAT II

> **Important:** Absolute maximum rated input voltage: 2500 Vrms (each side to ground).

> **Important:** Accuracy is based on a DMM with 10 MΩ input impedance.

> **Important:** Maximum input voltage varies by attenuation setting: ±350 V at 100x, ±700 V at 200x, ±1750 V at 500x, and ±3500 V at 1000x (DC + AC peak); observe the input voltage derating curve over frequency.

## About this New unit

This is a brand-new, factory-sealed unit, supplied exactly as it arrives from the manufacturer and backed by the full manufacturer warranty. For the exact configuration, available options, included accessories, or current lead time for your application, our Test Architects can confirm the details before you order.

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

**Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.**

## Details

- **Price:** 950.0 USD
- **Vendor:** Cal Test Electronics
- **Type:** Diff Probe
- **Tags:** Accessories, Cal Test Electronics, Differential, Manufacturers, Other Equipment, Probe, product_manual_group_1, Product_new

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 950.00 USD | In stock |

## Images

- Cal Test Electronics CT4072 100 MHz Differential Probe

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> Source: [ValueTronics](https://valuetronics.com/products/ct4072-cal-test-differential-probe-new)
> Updated: 2026-06-20