Digital scales
by On Balance
The On Balance MAR-100 scale is a waterproof digital pocket scale that measures to 0.01g accuracy across a 100g capacity — built for weighing concentrates, extracts, and dried herbs without fuss or guesswork. IP-65 rated against water and dust, it's one of the few mini scales you can actually rinse under a tap after use. If you've ever tried scraping sticky resin off a cheap scale with a credit card, you already know why that matters. When you buy the On Balance MAR-100 scale, you're getting a sealed unit that stays accurate long after ordinary pocket scales have drifted into uselessness.
The On Balance MAR-100 scale weighs up to 100g in 0.01g increments across six units, sealed to IP-65 standards. Here's everything you need at a glance — dimensions, capacity, and the details that separate this from a generic pocket scale.
| Spec | Value |
|---|---|
| Brand | On Balance |
| Model | IP-65 MAR-100 |
| SKU | HS1187 |
| Maximum capacity | 100g |
| Readability | 0.01g |
| IP rating | IP-65 (dust-tight, protected against water jets) |
| Weighing units | g, oz, ozt, dwt, ct, gn |
| Dimensions | 124 x 68 x 22mm |
| Interface | 4-button with LED display |
| Protective sleeve | Included |
| Feature | On Balance MAR-100 Scale | MYCO MZ-100 |
|---|---|---|
| Capacity | 100g | 100g |
| Readability | 0.01g | 0.01g |
| Waterproof rating | IP-65 | None |
| Rinseable under tap | Yes | No |
| Weighing units | 6 | 6 |
| Protective sleeve | Included | Included |
| Best for | Concentrates, sticky extracts, fine herbs | Dry herbs on paper |
Complete your setup: Pair the On Balance MAR-100 scale with calibration weights to keep readings accurate over time — even a 0.01g drift matters when you're working with concentrates. A small weighing tray or silicone mat also helps keep sticky material off the platform between rinses. Order a set of calibration weights alongside the scale and you'll have everything you need from day one. The MYCO Silicone Weighing Mat is a popular companion piece.
Residue buildup is the leading cause of accuracy drift in pocket scales, and the On Balance MAR-100 scale eliminates it with a fully sealed IP-65 housing you can rinse under running water. Most pocket scales die the same way: residue builds up in the crevices around the weighing platform, the buttons start sticking, and accuracy drifts. You can't clean them properly because water kills the electronics. So you end up wiping them down with a damp cloth, which never really gets the job done, and eventually the scale reads 0.03g when the platform is empty.
The On Balance MAR-100 scale sidesteps that entire problem. IP-65 means the housing is sealed against dust ingress and low-pressure water jets. In plain terms: you can run it under the tap. Sticky concentrate residue, herbal dust, resin — rinse it off, dry the scale, and you're back to accurate readings. That's not a luxury feature; it's what keeps a 0.01g scale actually reading 0.01g six months after you bought it. According to the European Monitoring Centre for Drugs and Drug Addiction (EMCDDA), accurate dosing equipment is a core component of harm reduction practice — and a scale that maintains its calibration is foundational to that.
At 124 x 68 x 22mm, it's genuinely pocket-sized — roughly the footprint of a bank card, just thicker. The included protective sleeve means you can toss it in a bag without worrying about the platform getting scratched or the buttons getting pressed. The one honest limitation: the LED screen isn't backlit, so in dim conditions you'll need a light source nearby. Not a dealbreaker, but worth knowing if you tend to weigh things in low light.
The On Balance MAR-100 scale is ready to weigh within seconds of unboxing — four buttons, no manual needed. Here's the process from first power-on to your first accurate reading.
The On Balance MAR-100 scale is the most durable 0.01g pocket scale we've stocked in over two decades of selling weighing equipment. We've been selling scales since the early 2000s, and the number one complaint we hear about cheap pocket scales is drift. Someone buys a scale, it reads fine for a month, then it starts showing 0.05g when the platform is empty. Calibration helps, but if dust or residue has worked its way into the load cell housing, recalibration alone cannot restore original accuracy — the contamination physically interferes with the strain gauge mechanism. The IP-65 sealing on the On Balance MAR-100 scale is genuinely the best solution we've found for people who weigh sticky or fine-particle materials regularly.
Compared to the MYCO MZ-100, which is another popular 100g x 0.01g scale in our range, the MAR-100's main advantage is that waterproof rating. The MYCO is a solid, reliable scale — no complaints — but you can't rinse it. If you're mostly weighing dry herbs on paper, either works. If you're weighing concentrates, extracts, or anything that leaves residue, get the MAR-100. The weight in your hand confirms the build difference too: the MAR-100 feels dense and sealed, like a solid unit rather than a plastic shell with electronics rattling inside. We also recommend browsing our digital scales category and our smart scale guide on the Azarius Encyclopedia for broader comparisons if you're still deciding.
One more honest note from behind the counter: the MAR-100 is not a milligram scale. If you need 0.001g resolution for microgram-level work, this isn't it — you'd want something from the On Balance CT series. But for the vast majority of customers who walk into our shop needing a reliable, cleanable pocket scale for herbs and concentrates, the On Balance MAR-100 scale is what we hand them.
Yes. The IP-65 rating means it's protected against low-pressure water jets from any direction. A gentle stream from the tap is fine for rinsing off residue. Don't submerge it completely or put it in the dishwasher — IP-65 covers water jets, not full immersion.
It reads to the nearest 0.01g, so a 0.50g sample will display as 0.50g. For anything below about 0.05g, readings can be less reliable on any scale at this price point — that's a physics limitation of the strain gauge technology, not a defect. If you're regularly measuring below 0.05g, you'd need a milligram scale (0.001g resolution).
No. On Balance sells calibration weights separately. We'd recommend picking up a 100g calibration weight and checking accuracy every few weeks, especially if the scale gets moved around a lot. Calibration takes about 10 seconds.
The IP-65 waterproof and dustproof rating is the main differentiator. Standard pocket scales have exposed gaps around the platform and buttons where moisture and dust get in. The On Balance MAR-100 scale is sealed, so it stays accurate longer and cleans up properly. Same 100g capacity and 0.01g precision as most pocket scales, but built to last.
Yes. The sleeve covers the buttons and platform, preventing accidental presses. It also stops the weighing surface from getting scratched by keys or coins. The scale auto-shuts off after a period of inactivity as well, so battery drain from accidental activation isn't really an issue.
The MAR-100 uses 2 x AAA batteries. They're widely available and easy to swap out. Battery life is solid for a pocket scale — you'll get months of regular use before needing replacements.
For most personal use, 100g is plenty. That's roughly 3.5 ounces. If you're regularly weighing amounts above 100g, you'd want a compact bench scale with a higher capacity. For concentrates, extracts, and typical herb portions, 100g with 0.01g precision hits the sweet spot.
Last updated: April 2026
