# AstroAI AM33B 2000-Count Digital Multimeter

Count Digital: AstroAI AM33B is a battery-powered, manually ranged multimeter for basic electrical checks at home and on vehicles. It measures AC and DC voltage, DC current, resistance and diode function, with continuity buzzer and battery test modes. The listing specifically says it cannot test AC current.

- [Original product page](https://best-deals.pro/product/astroai-am33b-2000-count-digital-multimeter)
- [View offer](https://best-deals.pro/visit/astroai-am33b-2000-count-digital-multimeter)
- Market: US
- Language: en-US
- Currency: USD
- Brand: AstroAI
- Model: AM33B
- Category: Tools & Garden > Hand Tools
- Price: 14.58 USD
- Previous price: 18.99 USD
- Discount: 23%
- Price checked: 2026-11-12T11:49:47.372Z
- Rating: 4.6 / 5
- Reviews: 1608

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Manual range selection gives the user control over measurement ranges but requires choosing the appropriate setting.
- The listing describes AC and DC voltage measurement, DC current, resistance, diode testing and a continuity buzzer. It explicitly excludes AC current measurement.
- 1.5V and 9V battery modes are described as automatically displaying battery status. A 12V battery mode is also listed.
- Data hold, auto shutoff, a backlit LCD and low-battery indication are listed.

## Pros

- Covers common household and automotive checks, including AC/DC voltage, DC current, resistance, continuity and diode testing.
- Includes dedicated 1.5V, 9V and 12V battery test modes, with automatic status indication specified for the 1.5V and 9V modes.
- Backlit display, data hold, continuity buzzer and auto shutoff support practical troubleshooting.

## Cons

- Cannot measure AC current, as the listing explicitly states.
- Manual range selection requires the user to select a suitable range rather than relying on auto-ranging.

## Specifications

### Identity
- Brand: AstroAI
- Model: AM33B
- Display count: 2000 Counts.
- Range selection: Manual
### Measurements
- DC voltage ranges and accuracy: 200mV/2V/20V/200V/600V ±\(0.5%+3\)
- AC voltage ranges and accuracy: 200V/600V ±\(0.8%+5\)
- DC current ranges and accuracy: 2000µA/200mA/10A ±\(1.2% +3\)
- Resistance ranges and accuracy: 200Ω/2KΩ/20KΩ/200KΩ ±\(1.0%+3\)；20MΩ ±\(1.5%+3\)
### Power and battery
- Power configuration: Battery Powered
- Meter power specification: 2 x 1.5 V AAA Batteries
- Battery test modes: 1.5V, 9V, and 12V battery test modes
### Operation and protection
- Sample speed: 3 Times Per Second
- Overload indication: "OL" Displayed
- Fuse protection: mA: F250 mA/250 V Fuse；10 A: F10 A/250 V Fuse
### Environmental and category ratings
- Environmental conditions: CAT II 600 V; CAT Ill 300 V Pollution Level 2 Temperature and Humidity 32-104 ° F \(0-40 °C\)；\(<80% RH, <10 °C RH\)
### Dimensions and installation
- Dimensions listed: 3.03 x 5.26 x 1.46 inches
- Weight listed: 0.15 kg
- Color: Black

## Before you buy

- Listing specifications include CAT II 600 V and CAT Ill 300 V, but the category text uses the inconsistent designation “CAT Ill.” The manufacturer also claims double-fuse overload protection and a protective silicone cover, while the supplied contents list does not mention batteries or a cover. Confirm the applicable rating and selected package details before purchase.

## In the box

- 1 x Multimeter (Included)
- 1 x Test Leads \(Pair\) (Included)
- User manual (Included)

## A good fit for

- DIYers checking household electrical components, fuses and batteries within the stated measurement functions.
- Hobbyists or automotive users troubleshooting vehicle electrical components and charging systems who need DC current, voltage, resistance and diode checks.

## Less suited to

- Anyone who needs to measure AC current.
- Buyers seeking automatic range selection.

## Customer feedback

Customer feedback highlights basic-function performance, ease of use, compact size and screen readability. These qualities suit straightforward checks using the listed manual ranges and backlit display. Accuracy feedback is mixed, with some customers reporting accurate readings and others describing voltage-measurement issues, so buyers relying on precise readings should account for that uncertainty.
- Positive themes: Customers report that it works well for basic functions and is simple to use.
- Positive themes: Customers appreciate its compact size and readable screen.
- Mixed feedback: Accuracy feedback is mixed. Some customers report accurate readings, while others mention voltage-measurement issues.

## Frequently asked questions

### Can the AstroAI AM33B measure AC current?
No. The listing explicitly says this meter cannot test AC current. Its current ranges are specified for DC current.
### Does it measure AC and DC voltage?
Yes. The supplied specifications list DC voltage ranges from 200mV to 600V and AC voltage ranges of 200V and 600V.
### Does the meter test batteries?
The listing describes 1.5V, 9V and 12V battery test modes. Automatic battery status indication is specified for the 1.5V and 9V modes.
### Is this multimeter auto-ranging?
No. The specifications identify range selection as manual, so users must choose the appropriate measurement range.

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## Add-ons

- [WG-026 10-Piece Test Lead Set with Alligator Clips, 22 AWG, 20.5-Inch \| 5 Colors Copper Wire Soldered and Stamped Alligator Clips，Testing Probes, Crocodile Jumper Wires Cable for Electrical Testing](https://best-deals.pro/visit/astroai-am33b-2000-count-digital-multimeter)

## Images

![AstroAI AM33B 2000-Count Digital Multimeter — 1](https://best-deals.pro/i/VpMD0b5ILkmO_8b_cw5f_kwCQ_mAalF6PyYFqyq0OqB3iAgn_S9l_UCoOByV_Pb5617vL2JIvHieYzTRl7TMMdZqpyERNsu6TX-JuNIDxz9b1pa-ngjQ.jpg)

![AstroAI AM33B 2000-Count Digital Multimeter — 2](https://best-deals.pro/i/YixnLf4M6VhqBfs7PhXIPo_klJU_aIz_CeFpdJylADklvUTs4jeTZhlu1Tva7aC9O2_VEQm1pBvclVZfKqYXVcPO8X82qxJcehKAiRuFtgH7FY1IxHnR.jpg)

![AstroAI AM33B 2000-Count Digital Multimeter — 3](https://best-deals.pro/i/1JhJtO9UcQAb6EUIjF8TjtkgoZIMytndOlX2pdf2mzL85wGrxkVbTazJuKGBjuqoUpgbV8m-DrCoRQLk_84z6yLKN5IevONTWc5jfrXhAhj0oVpBrYaj.jpg)

![AstroAI AM33B 2000-Count Digital Multimeter — 4](https://best-deals.pro/i/0iikH-1aBWcYjmNuxwWR1MkM_bPS-Z_JKcL2MAyCeUWs-SNTSUxWB00ZWMSiJlulyyAbIfziu7R7bVDan_cDABFOyulwCuNTNH8cH91z6s6k9d7fF-WC.jpg)

![AstroAI AM33B 2000-Count Digital Multimeter — 5](https://best-deals.pro/i/FkXBes6t6k_V0ivqAs4CbGkwx3qqsN6hBwfH9KeXCKjUAc5WtrwrN7u_TRO6WfxR06d5l6sIE75pIZYnSj4gtorBk5DJj7tEXjC0YIdXsUZefuNGTYvh.jpg)

![AstroAI AM33B 2000-Count Digital Multimeter — 6](https://best-deals.pro/i/l_gkQGcIEr1rW7TddeUj5SlUfSIDrPwerJEYgMYM_AglExDf_UOZu1OGH-g8gRS-vEPM8JHHrmM8vZ17GU3Q-mBaDrkRbqkpm-WkzJb1J9cKSSFxCsuX.jpg)

![AstroAI AM33B 2000-Count Digital Multimeter — 7](https://best-deals.pro/i/Qi1FkxfKt9cbELdRM9LqLpcATn3B7deV2C36dzMr6-716F9ZXR7A_aASjOHuM4B8iOjdgvBDvXAf0nNLDnTi3W5wNfX5bmB8CDPYz5OvO6OYlF0oBU7t.jpg)