DF400 Toilet Paper Level Sensor
DF400 Toilet Paper Level Sensor
Laser Ranging for Washroom Consumable Monitoring
DF400 uses laser ranging to monitor remaining toilet paper or towel length from 3 to 200 cm. Reports via NB-IoT, LoRaWAN, or Sigfox for facility teams to reduce empty dispensers and plan replenishment from actual data.
Last updated: May 31, 2026
Customer Value
Built for facility teams that need paper-level visibility without manual checks
Laser Ranging
Measures remaining paper or towel length from 3 to 200 cm with 3 mm accuracy using laser technology inside the dispenser.
Compact Design
68 x 64 x 18 mm, 40 g black ABS enclosure fits inside standard dispensers without affecting normal usage.
Multiple Wireless Options
NB-IoT, LoRaWAN, and Sigfox versions support different regional network conditions.
Long Battery Life
2 x AA batteries provide ~1 year at 3 reports/day, depending on field conditions.
Replenishment Planning
Actual consumption data enables data-driven replenishment, reducing unnecessary checks.
CE and RoHS Certified
Quality and environmental compliance for washroom facility deployment.
Hard Facts
Hard facts for product evaluation
Laser ranging measurement range
Blind area
Height accuracy reference
Sensor weight
NB-IoT, LoRaWAN, Sigfox
Battery life at 3 reports/day
Quality certifications
Operating temperature range
Applications
Paper level monitoring for washrooms, healthcare, and public facilities
DF400 is suitable for public washrooms, healthcare, commercial buildings, and any site where toilet paper or towel level visibility helps improve service quality.
Technical Specifications
DF400 key specifications
| Item | Specification |
|---|---|
| Product model | DF400 Toilet Paper Level Sensor |
| Dimensions | 68 x 64 x 18 mm |
| Net weight | 40 g |
| Color and material | Black ABS enclosure |
| Sensing principle | Laser ranging |
| Measuring range | 3 to 200 cm |
| Blind area | 3 cm |
| Height accuracy | 3 mm reference value |
| Wireless options | NB-IoT, LoRaWAN, Sigfox |
| Power supply | 2 x AA batteries; batteries are not included by default |
| Battery life | Approx. 1 year at 3 reports per day, depending on field conditions |
| Operating temperature | -20 to +70 Celsius |
| Storage temperature | -40 to +85 Celsius |
| Certifications | CE, RoHS |
Comparison
DF400 vs DF200 Facility Monitoring Sensors
Choose between DF400 (laser paper level) and DF200 (capacitive liquid level) for facility monitoring.
| Factor | DF400 Toilet Paper Sensor | DF200 Dispenser Sensor |
|---|---|---|
| Target | Paper/towel remaining length | Liquid level in dispensers |
| Principle | Laser ranging | Capacitive sensing |
| Output | Continuous: 3-200 cm | 5 levels: 0/25/50/75/100% |
| Size/weight | 68x64x18 mm, 40 g | 11.5x10.5x26 cm |
| Power | 2 x AA (~1 year) | 6V battery or 6 VDC |
| When to choose | Paper/towel level monitoring | Soap/sanitizer level monitoring |
Product Video
DF400 toilet paper surplus sensor demonstration
Watch the DF400 demo showing laser ranging for toilet paper and towel level monitoring.
Selection Guide
How to Choose the Right DF400 Configuration
Where to Buy
Request a DF400 project quotation
DF400 is sold by quotation. Share dispenser type, network preference, and deployment scale.
Useful inputs
- Dispenser type and internal dimensions
- Preferred NB-IoT, LoRaWAN, or Sigfox network
- Report frequency, quantity, delivery schedule
FAQ
Frequently Asked Questions about DF400 Toilet Paper Level Sensor
What does DF400 monitor?
Remaining toilet paper or towel length via laser ranging, 3 to 200 cm.
How does DF400 detect level?
Laser ranging inside the dispenser. 40 g, 3 mm accuracy.
Which wireless versions?
NB-IoT, LoRaWAN, Sigfox.
Power supply?
2 x AA batteries, ~1 year at 3 reports/day.
Certifications?
CE and RoHS.
Installation?
Inside dispenser. 68x64x18 mm black ABS.
Platform integration?
Cloud dashboard, alerts, facility management.
Standard product?
Yes. Quotation-based pricing.
CNDINGTEK Support
Evaluate DF400 for your facility project
Share dispenser type, network preference, and deployment scale.