# Cal Test CT2700 40 kV High Voltage DMM Probe # Cal Test CT2700 40 kV High Voltage DMM Probe ## Key Features At A Glance - Maximum input voltage of 40 kV (DC + AC peak) or 28 kVrms AC — verify rating matches the intended measurement before connecting - 1000:1 voltage division ratio — a 1,000 V input reads as 1 V on the connected DMM - DC accuracy of ±1% below 20 kV and ±3% from 20 kV to 40 kV (≤0.5% when used with a 10 MΩ input impedance DMM) - AC accuracy of 5% at 60 Hz across the 1 to 28 kV range - 1000 MΩ input resistance with bandwidth of 300 Hz (-3 dB) - Retractable-sleeve 4 mm sheathed banana plug output for connection to standard DMMs - Meets IEC 61010-031 CAT I safety standard - Temperature coefficient of ≤200 ppm/°C after 15-minute stabilization The Cal Test Electronics CT2700 is a high voltage DMM probe that extends the measurement range of a standard digital multimeter to voltages up to 40 kV DC (or 28 kVrms AC). Using a precision 1000:1 voltage divider, the probe scales high voltage inputs down to a level a standard meter can safely read — a 1,000 V input reads as 1 V on the DMM. Output is provided through 4 mm sheathed banana plugs designed to connect to any DMM with a minimum 10 MΩ input impedance. The CT2700 is intended for high voltage measurement applications where a standard DMM lacks sufficient input range. With its 1000 MΩ input resistance and 300 Hz bandwidth, it is suited to DC and low-frequency AC voltage measurement on high voltage power supplies, transformers, and similar equipment. The retractable sheathed banana plug design and IEC 61010-031 CAT I rating reflect its intended use as a measurement accessory in controlled bench and lab environments. ## Brand Heritage Cal Test Electronics is a US-based manufacturer of test and measurement accessories, including test leads, probes, and adapters used across electronics labs, service environments, and educational programs. ## Product Core & Specifications Electrical Specifications Maximum Input Voltage (CAT I) 40 kV (DC+Peak AC) 28 kVrms AC Division Ratio 1000:1 Bandwidth 300 Hz (-3 dB) Temperature Coefficient ≤200 ppm/°C Input Resistance 1000 MΩ DC Volts Accuracy ±1% (<20 kV) ±3% (20 kV to 40 kV) ≤0.5% (with 10 MΩ input impedance DMM only) AC Volts Accuracy 5% at 60 Hz (1 to 28 kV) Maximum Loading Current ≤40 µA (at 40 kV DC) Maximum Loading Power ≤1.6 W Source Impedance 10 MΩ Mechanical Characteristics Dimensions (Length x Diameter) 340 x 80 mm Cable Length 3.3 ft (1 m) Weight 0.66 lbs (300 g) Environmental Characteristics Designed for Use in Pollution Degree 2 Operating Environment 32°F to 122°F (0°C to 50°C) Storage Temperature \-4°F to 158°F (-20°C to 70°C) Humidity ≤80% relative humidity at 104°F (40°C) Safety Specifications Safety Standard IEC 61010-031 CAT I **Important:** Requires a DMM with a minimum 10 MΩ input impedance. Maximum input: 40 kV (DC + AC peak) or 28 kVrms AC.**Important:** All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 25 °C ± 5 °C.**Important:** DC Volts Accuracy of ≤0.5% is achievable only when used with a DMM having 10 MΩ input impedance.**Important:** Rated CAT I per IEC 61010-031; not for use on CAT II/III/IV measurement circuits. **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:** 107.05 USD - **Vendor:** Cal Test Electronics - **Type:** Volt Probe - **Tags:** Accessories, Cal Test Electronics, Manufacturers, Other, Other Equipment, Probe, product_manual_group_3, Product_new ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 107.05 USD | In stock | ## Images - CT2700 Cal Test Probe --- > Source: [ValueTronics](https://valuetronics.com/products/ct2700-cal-test-probe-new) > Updated: 2026-05-30