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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
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Description
Dust Opacity Monitor - MRU DM 401 (short)* DM 401 BROCHURE * Description Product Overview The DM 401 (short) is a double pass dust opacity monitoring system used for continuous in situ measurement for use in a short optical path length 20" to 157" (0. 5m to 4m) Features Direct continuous measurement across stack Small, lightweight & low operating costs Simple installation, commissioning and operation No moving parts minimal maintenance PC based setup, control and data logging Long life green
* DM 401 BROCHURE *
Description
Product Overview
The DM 401 (short) is a double pass dust opacity monitoring system used for continuous in-situ measurement for use in a short optical path length 20" to 157" (0.5m to 4m)
Features
- Direct continuous measurement across stack
- Small, lightweight & low operating costs
- Simple installation, commissioning and operation
- No moving parts – minimal maintenance
- PC based setup, control and data logging
- Long-life green LED source
- High measuring accuracy
- Opacity or mg/m3 (*) after on site calibration according to VDI 2066
Double pass opacity and dust monitoring system used for continuous in-situ measurement.
Basic Equipment
- Direct continuous measurement across stack
- Small, lightweight & low operating cost
- Simple installation, commissioning and operation
- No moving parts – minimal maintenance
- PC based setup, control and data logging
- Long-life green LED source
- High accuracy
- Opacity or mg/m3 (*) after on site calibration according to VDI 2066
Technical Data
| Measuring ranges | |
|---|---|
| Opacity | 0 … 100 % opacity 10 … 1,000 mg/m3 dust (after on site calibration according VDI 2066) |
| Dimensions and other data | |
|---|---|
| Data transmission | galvanic isolated 4-20mA analog output RS485 with Modbus RTU protocol |
| PC-Interface | USB or RS485 |
| Media | only for non condensing flue gas |
| Accuracy | +/- 2 % |
| Housing | Aluminium die cast |
| Power supply | 22…24 Vdc / 20W |
| Protection class | IP 65 |
| Weight | appr. 10.72 lbs |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 1902 reviews
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Product Reviews
★★★★★ 5
The Ultimate Solution for Power Chewers!
Flavor Name: Beef, Size: Medium
I have a Pitbull mix who can usually destroy "tough" toys in minutes, but the Bam-Bones Plus is a total game-changer. The bamboo and nylon blend is incredibly dense; it satisfies that natural urge to chew without splintering like real wood or falling apart like rubber. It wears down slowly and safely, giving my dog weeks of use rather than minutes.
Smart, Functional Design
The T-bone shape is brilliant because of the "paw-grip" base—it makes it so easy for my dog to hold it steady while she works on it. I’ve also noticed her teeth looking much cleaner since we started using this, as the raised textures act like a natural toothbrush. Plus, the infused beef scent keeps her interested much longer than a plain nylon bone ever could.
Final Verdict
This is a must-have for any owner of a large or aggressive chewer. It’s safe, long-lasting, and provides excellent mental stimulation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
★★★★★ 4
Fantastic Durable Chew Toy That My Dog Loves!
Flavor Name: Beef, Size: Medium
Absolutely thrilled with this dog chew toy! It’s extremely tough and durable — perfect for aggressive chewers and keeps my pup entertained for a long time. The bamboo fiber and nylon design feels sturdy yet gentle on the teeth, and it even helps with dental hygiene by massaging gums while he chews. My dog goes crazy for this bone and it lasts way longer than other chew toys we’ve tried. Great quality and great value — highly recommend for any dog
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 17, 2026
★★★★★ 5
Great stimulation for active chewers!
Flavor Name: Peanut Butter, Size: Large, Flavor Name: Peanut Butter, Size: Large
"Long lasting chews" never make it past 5 minutes in mouth of my Golden Retriever, but this one will! He immediately started chewing on it and barely made a dent. Love that this product is safe, clean, and enjoyable for my boy. Highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
100% Puppy-Approved
Flavor Name: Beef, Size: Small
My little fur baby absolutely LOVES this!! ❤️ He immediately got the zoomies when I gave it to him. 🤣
It's his new favorite chew toy and keeps him occupied for long spans of time while inside or outside of his crate. Very durable, smells pleasant, and is the perfect size for my small puppy (he is currently 10 lbs and I got him the small one). Previous chew toys that I purchased were too large/heavy for him to pick up, but this one is lightweight and perfect! I highly recommend! 🙌🏾
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Not destuctable
Flavor Name: Peanut Butter, Size: Medium
This is the first toy that none of my dogs have destroyed. It's still going strong and they love carrying it around and gnawing on it every day. The material is durable and the product is the perfect size. I will buy more soon.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
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