Dev tools · alternatives · 2026
24 alternatives to FJDynamics Digital Refractometer
Test Brix, Salinity and TDS
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. FJDynamics Digital Refractometer launched in 2022; newer entries below may have overtaken it.
- 1
Digital Brix Refractometer, Brix Refractometer, FJDynamics
2022 · its alternatives →
- 2
AnyLeaf: Cutting-edge SUAS hardware
2020 · anyleaf.org · its alternatives →
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- 5AA
2017 · anfractuosity.com · its alternatives →
- 6
If you've built any web-based app in the last 15 years, you probably used something like Datadog, New Relic, Sentry, etc. to monitor and trace your app, right? Why should it be different when the app you're building happens to be using LLMs? So today we're open-sourcing OpenLLMetry-JS. It's an open protocol and SDK, based on OpenTelemetry, that provides traces and metrics for LLM JS/TS applications and can be connected to any of the 15+ tools that already support OpenTelemetry. Here's the repo: https://github.com/traceloop/openllmetry-js A few months ago we launched…
2024 · github.com · its alternatives →
- 7
Coppers is a custom test harnass for Rust that measures the energy usage of your test suite. - ThijsRay/coppers
2022 · github.com · its alternatives →
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Quickly check food for allergens and intolerances with AR
2020 · jordibruin.github.io · its alternatives →
- 10
Sensors and measurement for science, hydroponics, and aquariums
2021 · anyleaf.org · its alternatives →
- 11
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Tasterforce▲60Taste-testing community shaping the future of healthy foods
2021 · typeform.com · its alternatives →
- 14
- 15
$99 sensor uses data to help you grow better veggies or weed
2020 · its alternatives →
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Hi HN, I'm developing an open-source water meter for Home Assistant and thought the HN community might be interested. I've been using some version of it after a few costly toilet leaks that my city meter missed. Recently, I decided to polish it up so others could use it. It might also function as a gas meter reader (https://youtu.be/9Dso4EBAoiE), but this is still experimental. The device runs on 3 AA batteries and utilizes an ESP32-S3. It works by measuring the spinning magnet inside the brass housing. It stays in deep sleep until it needs to transmit usage or leak…
2023 · hackaday.io · its alternatives →
- 19
Open hardware to measure EC and pH, drive pumps, and otherwise manage a mid-size hydroponic grow over Wi-Fi. - hydromisc/hydromisc
2021 · github.com · its alternatives →
- 20
CO2 measuring christmas ball that changes color based on CO2 level - jacobqvist/christmas-ball
2021 · github.com · its alternatives →
- 21
This has been a pet project of mine for the past ~5 months. It consists of six visualizations: - Spectrogram: Implements the reassignment method for sharper time and frequency resolution. - Spectrum analyzer: A-weighted, frequency guidelines, loudest frequency tooltip. - Waveform: Colored based on frequency, loudness, or static - Oscilloscope: Tracks pitch and autocorrelates against a reference signal, provides stability. Also includes a regular zero-crossing trigger. - Stereometer & Phase meter: Linear and exponential scaling modes, adjustable windows. Multi-band correlation meter. -…
Mar 2026 · github.com · its alternatives →
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Research-backed microplastics scanner for food
Apr 2026 · apps.apple.com · its alternatives →
- 24
Free web-based tools for screen & monitor testing
Jan 2026 · screentest.io · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →