# HT Instruments HT61 CAT IV 6000-Count TRMS Multimeter # HT Instruments HT61 CAT IV 6000-Count TRMS Multimeter ## Key Features At A Glance - CAT IV 600V / CAT III 1000V measurement category with double insulation per IEC/EN61010-1 - 6000-count TRMS handheld multimeter with 4-digit LCD, bargraph, and backlight - DC voltage and AC TRMS voltage measurement to 1000V (AC specified 50Hz to 400Hz) - Low-impedance (LoZ) DC/AC voltage mode at approx 3k input impedance - DC and AC TRMS current to 10A (20A for max 30s, accuracy not declared) - Resistance to 60M, continuity buzzer (<100), and diode test - Frequency measurement to 40MHz plus duty cycle from 0.1 to 99.9% - Data HOLD, MAX/MIN, REL, and RANGE functions with auto power-off after 15 minutes The HT61 is a CAT IV, 6000-count TRMS digital multimeter from HT Instruments (HT Italia SRL). It uses true-RMS conversion and presents readings on a 4-digit LCD with a 6000-count display, sign and decimal-point indication, an analog bargraph, and a backlight, with an "OL" over-range indication and automatic polarity. A true-RMS digital multimeter measures voltage, current, resistance, and related electrical parameters, reporting accurate values for both sinusoidal and non-sinusoidal signals. The HT61 covers DC and AC TRMS voltage, DC and AC TRMS current, resistance and continuity, diode test, frequency, and duty cycle within a single handheld instrument. ValueTronics stocks and holds its own inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. ## Product Core & Specifications Specification Value DC Voltage (Accuracy \[rdg + (num dgt × resolution)\], ta 18°C…28°C, <75%RH) 600.0 mV (Resolution 0.1 mV) (0.8rdg+5dgt) 6.000 V (Resolution 0.001 V) (0.8rdg+5dgt) 60.00 V (Resolution 0.01 V) (0.8rdg+5dgt) 600.0 V (Resolution 0.1 V) (0.8rdg+5dgt) 1000 V (Resolution 1 V) (0.8rdg+5dgt) Input impedance \>10 MΩ Overload protection 1000VDC/ACrms AC TRMS Voltage (Accuracy specified from 5% to 100% of measurement range) 6.000 V (Resolution 0.001 V) (1.0rdg+8dgt) @ 50Hz…60Hz; (2.0rdg+8dgt) @ 61Hz…400Hz 60.00 V (Resolution 0.01 V) (1.0rdg+8dgt) @ 50Hz…60Hz; (2.0rdg+8dgt) @ 61Hz…400Hz 600.0 V (Resolution 0.1 V) (1.0rdg+8dgt) @ 50Hz…60Hz; (2.0rdg+8dgt) @ 61Hz…400Hz 1000 V (Resolution 1 V) (1.2rdg+8dgt) @ 50Hz…60Hz; (2.5rdg+8dgt) @ 61Hz…400Hz Input impedance \>10 MΩ Crest factor 3 (up to 500V), 1.5 (up to 1kV) Overload protection 1000VDC/ACrms DC/AC TRMS Voltage with Low Impedance (LoZ), 50Hz…400Hz 600.0 mV (DC only) (Resolution 0.1 mV) (0.8rdg+5dgt) 6.000 V (Resolution 0.001 V) (0.8rdg+5dgt) 60.00 V (Resolution 0.01 V) (0.8rdg+5dgt) 600.0 V (Resolution 0.1 V) (0.8rdg+5dgt) 1000 V (Resolution 1 V) (0.8rdg+5dgt) Input impedance approx 3 kΩ Overload protection 1000VDC/ACrms DC Current 600.0 µA (Resolution 0.1 µA) (1.0rdg+3dgt) 6000 µA (Resolution 1 µA) (1.0rdg+3dgt) 60.00 mA (Resolution 0.01 mA) (1.0rdg+3dgt) 600.0 mA (Resolution 0.1 mA) (1.0rdg+3dgt) 6.000 A (Resolution 0.001 A) (1.5rdg+3dgt) 10.00 A (Resolution 0.01 A) (1.5rdg+3dgt); 20A for max 30s with not declared accuracy Overload protection (inputs mA, µA) Fast Fuse 800mA/1000VAC/DC Overload protection (input 10A) Fast Fuse 10A/1000VAC/DC AC TRMS Current (Accuracy specified from 5% to 100% of measurement range, 40Hz…400Hz) 600.0 µA (Resolution 0.1 µA) (1.5rdg+8dgt) 6000 µA (Resolution 1 µA) (1.5rdg+8dgt) 60.00 mA (Resolution 0.01 mA) (1.5rdg+8dgt) 600.0 mA (Resolution 0.1 mA) (1.5rdg+8dgt) 6.000 A (Resolution 0.001 A) (2.0rdg+3dgt) 10.00 A (Resolution 0.01 A) (2.0rdg+3dgt); 20A for max 30s with not declared accuracy Overload protection (inputs mA, µA) Fast Fuse 800mA/1000VAC/DC Overload protection (input 10A) Fast Fuse 10A/1000VAC/DC Diode Test Max test current <0.9 mA Open voltage 2.8 V Resistance and Continuity Test 600.0 Ω (Resolution 0.1 Ω) (1.0rdg+4dgt) 6.000 kΩ (Resolution 0.001 kΩ) (1.0rdg+4dgt) 60.00 kΩ (Resolution 0.01 kΩ) (1.0rdg+4dgt) 600.0 kΩ (Resolution 0.1 kΩ) (1.0rdg+4dgt) 6.000 MΩ (Resolution 0.001 MΩ) (1.0rdg+4dgt) 60.00 MΩ (Resolution 0.01 MΩ) (2.0rdg+10dgt) Continuity buzzer <100 Ω Overload protection 1000VDC/ACrms Frequency (Electronic circuits) 9.999 Hz (Resolution 0.001 Hz) (0.1rdg+8dgt) 99.99 Hz (Resolution 0.01 Hz) (0.1rdg+8dgt) 999.9 Hz (Resolution 0.1 Hz) (0.1rdg+8dgt) 9.999 kHz (Resolution 0.001 kHz) (0.1rdg+8dgt) 99.99 kHz (Resolution 0.01 kHz) (0.1rdg+8dgt) 999.9 kHz (Resolution 0.1 kHz) (0.1rdg+8dgt) 9.999 MHz (Resolution 0.001 MHz) (0.1rdg+8dgt) 40.00 MHz (Resolution 0.01 MHz) (0.1rdg+8dgt) Sensitivity 0.8 Vrms min (20% < duty < 80%, <100kHz); 5 Vrms min (20% < duty < 80%, >100kHz) Overload protection 1000VDC/ACrms Frequency (Electrical circuits) 10 Hz…400 Hz (Resolution 0.001 Hz) (1.5rdg+5dgt) Sensitivity 15 Vrms / 10 Arms Overload protection 1000VDC/ACrms Duty Cycle 0.1…99.9% (Resolution 0.01%) (1.2rdg+2dgt) Pulse width 100 µs ÷ 100 ms Frequency 5 Hz…150 kHz Overload protection 1000VDC/ACrms General Specifications Display LCD, 4dgt, 6000 counts, sign, decimal point and bargraph Polarity Automatic polarity indication Backlight Yes Over range indication “OL” Response time 2/s Conversion TRMS Features Data HOLD, MAX/MIN, RANGE, REL Power supply 1x9V alkaline battery NEDA 1604 IEC 6F22 Battery life ca. 25h (backlight ON), ca. 50h (backlight OFF) Auto Power OFF After 15 minutes of idleness Mechanical Specifications Dimensions (L x W x H) 175 x 85 x 55 mm Weight (included battery) 360 g Mechanical protection IP40 Environmental Conditions Working temperature 5°C ÷ 40°C Working humidity <80%RH Storage temperature \-20°C ÷ 60°C Storage humidity <80%RH Altitude max of use 2000 m Reference Guidelines Safety IEC/EN61010-1 EMC IEC/EN61326-1 Pollution degree 2 Insulation Double insulation Measurement category CAT IV 600V – CAT III 1000V > **Important:** Measurement category: CAT IV 600V – CAT III 1000V. ## 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:** 199.0 USD - **Vendor:** HT Instruments - **Type:** Multi Met - **Tags:** HT Instruments, Manufacturers, Meters & DAQ, Multimeter, product_manual_group_3, Product_new ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 199.00 USD | In stock | ## Images - HT Instruments HT61 CAT IV 6000-Count TRMS Multimeter --- > Source: [ValueTronics](https://valuetronics.com/products/ht61-ht-instruments-multimeter-new) > Updated: 2026-06-20