Rotational speed sensors rols-5pw
ROLS-5PW 激光转速传感器(Rotational speed sensors):可见红色激光 Class IIIa、蓝色 LED 瞄准指示、量程 1~300000 RPM、标准型测距 2 米与 45 入射角,免调节、抗干扰,用于转速监测与超速保护。
核心要点
Rotational speed sensors are used to monitor, regulate and control mechanical drive systems, and they matter most when it comes to protecting the rotating parts of an engine or drivetrain. ROLS-5PW is the laser type: point it at a reflective target and it gives one clean pulse per revolution.
Rotation speed sensors,Laser RPM Sensor
Rotational speed sensors rols-5pw
Rotational speed sensors for industrial measurement tasks.
Rotation speed sensors are used to monitor, regulate and control mechanical drive systems and play a major role when it comes to protecting elements of a rotational system (e.g., in the engine, drive)...
- Visible red laser (Class IIIa) source
- Blue LED on-target indicator
- Measure speeds from 1 - 300,000 RPM
- Measure range up to 2 m and 45 degree
- No need to perform any adjustment
- Very easy to aiming the target
- Insulated L-board to avoid the interference

rols-5pw Laser RPM Sensor Specifications
| Speed Range | 1 - 300,000 RPM |
| Illumination | Visible Red Laser (Class IIIa) |
| On-Target Indicator | Green LED on wire end cap |
| Power Requirement | 5.0 Vdc @ 30mA |
| Output Signal | Positive pulse input voltage (0 to V+) |
| Operating Range | Up to 2m and 45 degree offset from target |
| Operating Temp | -10~+40°C |
| Cable length | 2.4m |
What it measures and why laser
转速传感器输出的是与转速成正比的脉冲序列,控制系统据此做调速、同步、超速保护。磁电式需要齿盘、霍尔需要磁钢,而激光式只要在旋转件上贴一小片反光标记,不改变被测件结构,也不增加旋转质量。
ROLS-5PW 用可见红色激光(Class IIIa)作光源,机身带蓝色 LED 瞄准指示:光斑落在标记上时指示灯亮,离开时熄灭,安装时不用反复猜位置。标准型测量距离可达 2 米,允许 45° 入射角,狭小空间也能找到合适的安装角度;长距离型号可测更远。
Key specifications
- 测量范围 1~300000 RPM,覆盖从低速传动到高速主轴;
- 可见红色激光 Class IIIa,光斑小、指向明确;
- 蓝色 LED 瞄准指示,免调节、对准即用;
- L 型隔离电路板,抑制电磁干扰;
- 输出 TTL 方波,可直接进数采、PLC 或转速显示表。
对高速旋转设备,非接触测量还有一个隐性好处:没有附加负载,也没有线缆缠绕风险。风电主轴、汽轮机、离心机这类设备,用激光取转速比加装机械测速装置更省事。
Selection notes
英文资料里常见的 "no need to perform any adjustment" 指的是传感器本身不需要增益或阈值调节,接上就能用;但安装仍需注意三件事:标记要贴牢(高转速下贴纸易脱落,可改用反差记号笔)、光斑落在标记扫过的圆周上、传感器支架要有足够刚度。
需要模拟量输出时,配一台转速显示表把脉冲转换成 4~20 mA 或 0~5 V;需要在阳光下或户外使用,选带调制激光与窄带滤波的型号,普通光电式在强光下会误触发。
常见问题
标准型测距 2 米够用吗?
多数固定安装场景足够。需要更远距离时选长距离型号,或增大反光标记尺寸,同时注意光斑随距离扩大的影响。
45° 入射角是什么意思?
传感器光轴与被测面法线的夹角允许到 45°,给安装留出空间;但角度越大,反射信号越弱,尽量在 15~30° 之间取平衡。
Class IIIa 激光安全吗?
属于低功率激光,正常使用下短时照射风险低,但仍应避免直视光束、避免用光学仪器直视光路。
输出能直接进 PLC 吗?
可以,TTL 方波经电平转换或光耦隔离后接高速计数口;PLC 输入为 24V 时需加转换模块。
相关产品与延伸阅读
上海路阳仪器有限公司. 《Rotational speed sensors rols-5pw》[EB/OL]. 上海路阳仪器有限公司, 2024-10-01. https://www.luyor.net/jishuwenzhang/rols-5pw-Laser-RPM-Sensor.html.






