采购称重传感器时，"IP 防护等级"是绕不开的参数。但 IP65、IP67、IP68 到底差在哪？很多人只看到数字不同，却不清楚背后的实际含义，导致买错传感器、设备频繁故障。这篇文章用大白话讲清楚。
IP 后面的两个数字，各代表什么？
IP 是 Ingress Protection（进入防护）的缩写，后面两个数字分别代表：
- 第一位数字（0～6）： 防固体（灰尘）等级
- 第二位数字（0～9）： 防水等级
工业称重传感器里，第一位数字通常是 6（完全防尘），所以大家平时说的 IP65、IP67、IP68，关键区别在第二个数字——防水能力。
三个等级的核心区别
| 等级 | 防水能力 | 通俗解释 |
|---|
| IP65 | 防喷水 | 手持喷枪对着喷能扛，但不能泡水 |
| IP67 | 短时浸水 | 掉水里马上捞起来没事，但不能长期泡 |
| IP68 | 长期浸水 | 完全泡在水里，持续工作 |
简单记：
IP65 防"溅"，IP67 防"掉水里一下"，IP68 防"一直泡在水里"。
你的工况，决定你需要哪个等级
| 使用场景 | 最低要求 |
|---|
| 干燥室内、普通平台秤 | IP65 够用 |
| 偶尔接触水汽、轻微冲洗 | IP67 |
| 高压水枪冲洗、积水浸泡、潮湿环境 | 必须 IP68 |
食品厂每天用高压水枪冲洗设备、化工厂罐底常年积水、屠宰车间水花四溅——这些场景的传感器，只有 IP68 能扛得住。用 IP65 的传感器，等于让它"裸奔"，几个月就进水报废。
三个最常见的"坑"
坑一：数字越大越好，但也要看实际。 IP68 没有统一规定"能泡多深、泡多久"，不同品牌的实际防护能力有差异。选型时要看品牌的实测和口碑，不能只看数字。
坑二：IP68 是"选配"还是"标配"。 这是最容易被忽略的。很多品牌的 IP68 是选配项，要额外加钱升级，基础款只有 IP65 或 IP67。采购报价单上看着便宜，一问"IP68 要加多少钱"，价格就上去了。一定要问清楚标配还是选配。
坑三：只认 IP，不看材质。 IP 等级再高，如果壳体是合金钢、靠镀层防锈，划伤后照样生锈。真正的"防水防腐"，要 不锈钢材质 + 高防护等级 双管齐下。
源力传感的做法
源力传感全系称重传感器，IP68 是标配，不需要加钱升级。同时全部采用全不锈钢材质，从源头上解决生锈腐蚀问题。
- YLA6 悬臂梁传感器（10-500kg）：不锈钢 + IP68
- YLA8 剪切梁传感器（220-1760kg）：不锈钢焊接密封 + IP68
- YLA9 单点式传感器（10-100kg）：食品医药级不锈钢 + IP68
When sourcing load cells, the "IP protection rating" is an unavoidable parameter. But what exactly is the difference between IP65, IP67 and IP68? Many people only see different numbers without understanding their real meaning, leading to wrong purchases and frequent equipment failures. This article explains it in plain language.
What do the two digits after IP represent?
IP stands for Ingress Protection. The two digits that follow represent:
- First digit (0 ~ 6): protection against solids (dust)
- Second digit (0 ~ 9): protection against water
In industrial load cells, the first digit is usually 6 (fully dustproof), so when people talk about IP65, IP67 and IP68, the key difference lies in the second digit — water resistance.
The core differences among the three ratings
| Rating | Water resistance | Plain explanation |
|---|
| IP65 | Resists water jets | Withstands a handheld spray, but cannot be immersed |
| IP67 | Brief immersion | Survives being dropped in water and pulled out quickly, but cannot soak long-term |
| IP68 | Long-term immersion | Fully submerged and working continuously |
To remember simply:
IP65 resists "splashing", IP67 resists "a quick drop in water", IP68 resists "staying submerged in water".
Your working conditions determine which rating you need
| Usage scenario | Minimum requirement |
|---|
| Dry indoor, ordinary platform scale | IP65 is enough |
| Occasional moisture, light rinsing | IP67 |
| High-pressure washing, standing water, humid environment | Must be IP68 |
Food plants wash equipment daily with high-pressure guns, chemical plant tank bottoms stay flooded year-round, slaughterhouse workshops splash water everywhere — in these scenarios, only IP68 can hold up. An IP65 load cell there is like sending it out "naked"; it fails within months.
The three most common "pitfalls"
Pitfall 1: bigger numbers are better, but you must check the reality. IP68 has no uniform standard for "how deep and how long it can be submerged"; actual protection varies by brand. When selecting, look at the brand's real testing and reputation, not just the number.
Pitfall 2: is IP68 "optional" or "standard"? This is the most easily overlooked point. For many brands, IP68 is an option requiring extra payment; the base model is only IP65 or IP67. The quote looks cheap, but the moment you ask "how much to upgrade to IP68", the price jumps. Always ask clearly whether it is standard or optional.
Pitfall 3: looking only at IP, not the material. No matter how high the IP rating, if the housing is alloy steel relying on plating, it will still rust once scratched. True "waterproof and corrosion-proof" requires stainless steel material + high protection rating working together.
Yuanli Sensing's approach
Across Yuanli Sensing's entire load cell line, IP68 is standard — no extra charge for an upgrade. At the same time, all products use full stainless steel material, solving rust and corrosion at the source.
- YLA6 cantilever beam load cell (10-500 kg): stainless steel + IP68
- YLA8 shear beam load cell (220-1760 kg): welded sealed stainless steel + IP68
- YLA9 single-point load cell (10-100 kg): food & pharmaceutical grade stainless steel + IP68
HBM-level performance at only 1/7 of the price. Free samples, welcome to test the protection capability yourself. Consult: 025-58178050.