> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# FNIRSI FDM-02 Digital Sound Level Meter (30-130dB, A/C Weighting)

**Type:** Product page · **SKU:** CE11131 · **Brand:** [FNIRSI](https://core-electronics.com.au/brands/fnirsi)
**Page:** https://core-electronics.com.au/fnirsi-fdm-02-digital-sound-level-meter.html ([markdown](https://core-electronics.com.au/fnirsi-fdm-02-digital-sound-level-meter.html.md))

Put a real number on noise, from home theatre tuning to workshop tool levels, with live readings, a trend curve and high/low alarms.

## Pricing

- **Price:** $53.77 (inc GST) — $48.88 AUD, exc GST

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 500 more in 8–25 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=CE11131:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/CE11131:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

A pocket-sized decibel meter that turns "that sounds loud" into a measured number, reading sound pressure levels from 30 to 130dB on a crisp 2-inch colour IPS screen.

Our ears are poor judges of loudness, and they adapt quickly to sustained noise. Switch to A-weighting to measure the way human hearing perceives sound, ideal for checking workshop tools, appliances, traffic or a neighbour's party. Switch to C-weighting to capture the low-frequency energy A-weighting rolls off, handy when setting up subwoofers, balancing speakers or assessing machinery rumble.

Fast (125ms) and Slow (1s) response modes let you track sharp, impulsive sounds or average out a fluctuating source, while the real-time curve shows the last 30 seconds of sound so you can see exactly when levels spike. Set high and low thresholds and the meter logs the 30 most recent alarm events for later review.

It runs from a built-in 1500mAh rechargeable battery topped up over USB-C, so there are no coin cells to hunt down. For legal or workplace compliance testing, use a certified, calibrated sound level meter; this one is built for fast, practical everyday measurement.

### Features

- Measure everything from a quiet room to a loud concert with a 30–130dB range and 0.1dB resolution
- Choose how the meter hears with A-weighting (human hearing) or C-weighting (low-frequency and peak content)
- Catch quick bangs or steady drones by switching between Fast (125ms) and Slow (1s) response
- See trends, not just numbers: the real-time curve plots the last 30 seconds of sound level
- Never miss a noise event, with adjustable high/low thresholds (0–130dB), LED alarm and a record of the 30 most recent alarms
- Read it clearly anywhere on the 2-inch colour IPS display, with light/dark themes and 5–100% brightness
- Skip disposable batteries thanks to the built-in 1500mAh rechargeable cell with USB-C charging
- Save charge automatically with auto power-off adjustable from 1 to 60 minutes
- Take it anywhere: a compact handheld body with a storage bag included
 
### Specifications

 | Property | Specification |
|---|---|
| Model | FNIRSI FDM-02 |
| Measurement Range | 30–130dB |
| Accuracy | ±1.5dB (94dB @ 1kHz reference) |
| Resolution | 0.1dB |
| Frequency Weighting | A / C |
| Time Weighting | Fast (125ms) / Slow (1s) |
| Microphone | Condenser |
| Display | 2.0" colour IPS, light/dark themes |
| Brightness | Adjustable, 5–100% |
| Trend Curve | 30 seconds of real-time data |
| Alarm | High/low thresholds (0–130dB), LED indication, 30-event record |
| Battery | Built-in 1500mAh 3.7V lithium polymer, rechargeable |
| Charging | USB-C |
| Auto Power-Off | Adjustable, 1–60 minutes |
| Dimensions | 183 x 63 x 28mm |

### What's Included

- 1x FNIRSI FDM-02 Digital Sound Level Meter
- 1x USB-C charging cable
- 1x Storage bag