Topcon RL-H4C Rotary Laser Review

So here’s another candidate for best rotary laser level. Topcon is an incredible brand that has built unparalleled reputation thanks to its reliability and durability. The company has built a wide range of products which are characterized by great dependability. One of its superior product is the Topcon RL-H4C which is built on the spine of its Predecessor; the Topcon RL-H3C.

If you are in the market for a laser device that is tough, versatile, and provide great precision, the Topcon RL-H4C is an excellent option. This tool is built for professionals in the general construction area, manual slope jobs, and agricultural leveling tasks.

Topcon RL-H4C Best rotary laser level

Topcon RL-H4C Rotary Laser Overview

The basics

The Topcon RL-H4C is a superb auto leveling rotary laser that brings versatility and precision wrapped in its superior value. The laser has superfast self-leveling motors which exhibit accuracy to 1/16 of an inch at approximately 100ft.  In addition, the tool’s range is approximately 2600ft and is capable of leveling within 50. The device weighs approximately 14 pounds, and its D-1.5V can operate it for up to 100 hours. The Topcon RL-H4C is also weather resistance thanks to its capability to be resistant to water jets and dust. Other things that are supplied together with this device include; a carrying case, a battery holder, and user manual.

Operational and ease of use

The Topcon RL-H4C is simple to use and comes with a manual slope that displays capabilities similar to those of an automated cross axis self-leveling tool. The product packs a great set of features that anyone could be looking for in a well-built rotary level laser tool. Its slope matching feature utilizes two arrow buttons that allow for straightforward grade settings. You simply press the button to get the laser tilting and press it once more when the sensor signifies receipt of the laser on the grade.


Self level

The device can work in only horizontal plains and features a single grade slope setting. The superb slope feature makes it the perfect tools to use for excavating. If the tool is knocked out of its leveling position, it easily relevels with remarkable +/- 10 arc second accuracy in angular measurements. The HI alert system will send warnings via three flashing LED and an icon for the sensor to bar false reading. With all its features, the Topcon RL-H4C is an incredible device that outshines competitors in its class.  The Topcon RL-H4C laser device has an incredible electronic self-leveling mechanism which offers stable laser at all job sites including those prone to vibration.

Cleaning and care

Taking care of this device is easy thanks to the support of the stackable carrying case. The carrying case provides improved protection to the device and also offer extra space to carry additional accessories. In addition, you can securely stack multiple cases to save space for storage and aid transportation.

Power usage

Furthermore, this Topcon RL-H4C laser device support dry rechargeable battery use. Its batteries are capable of supporting up to 80 hours of uninterrupted use.


Further specifications

Special features

The Topcon RL-H4C has a power transmitter that sends a reliable, self-leveled laser 3600 reference steadily over the entire workplace. This makes it easy to work continuously for longer with unprecedented precision right from the initial setup.

Besides, its high powered 2.4MW diode provides up to 2600ft working diameter making it an excellent source reference for machine mounted receivers. Additionally, the Topcon RL-H4C comes with a new LS 80L long distance laser sensor. The sensor provides an increased working range besides the other Topcon RL-H4C rotating lasers. The device points out the position of the laser beam with the two LCDs on both of its sides. The LCD icon is also capable of notifying the HI alert and low battery warnings.

Design Features

Moreover, the device comes with a low battery indicator plus an out of level indicator that utilizes a two-way communication system. There are two LCD displays with one featured on the front and the other on the rear. What’s more; Topcon RL-H4C has a unique dual handle design that allows for easy horizontal level maneuver.


There are a plethora of construction lasers in the modern market, for this reason, it is a daunting task to shop around and get the best. The only way out is researching for different models and making a decision based on an expert review. We have compiled an expert review of the Topcon RL-H4C device, and it’s always nice to compare it to one of its closest competitors.

The device compares favorably to the Bosch GRL-400HKC laser tool. This device has an auto-leveling capacity of +/- 50 and a range which is up to 1300ft. Besides, Bosch GRL-400HKC accuracy is 3/32 at approximately 100ft, and its rotation is 350, 600, 1, and 200rpm. The device is around 5.3 pounds in weight and comes with 2D -1.5V battery capable of lasting up to 40 hours. Additionally, the Bosch GRL-400HKC comes with a two-year warranty.

Topcon RL H4C best rotary laser level


Looking at the comparison, it’s vivid that the Topcon RL-H4C is heavier than the Bosch GRL-400HKC. However, the Topcon RL-H4C laser device has some features that help it outshine its competitor. For instance, its D-1.5V can support up to 100 hours of use which is much longer than that of its competitor. Also, when you buy the Topcon RL-H4C laser device, you get a five-year warranty cover, compared to the two years provided by Bosch GRL-400HKC. However, Topcon RL-H4C laser device is expensive than the Bosch GRL-400HKC which is one of its major drawbacks.


  • Tough construction that is highly durable
  • Waterproof and dustproof
  • Automatic shutoff after staying unused for 30 minutes
  • Superb slope matching capabilities
  • 5 year limited warranty
  • High power diode
  • Long battery life


  • It is pricey
  • Slope feature doesn’t indicate the exact slope the user is on.

Best rotary laser level wrapping it up

The Topcon RL-H4C laser device is a great tool designed for long distance measuring. The device is epitomized by precision, dependability, and durability.  Although this is not the best laser tool the market has to offer it delivers superb performance that can beat some of the high-end tools. Buyers have said it’s one of the most reliable and rugged rotating lasers in its class. Maybe this really is the best rotary laser level on the marketplace.

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