WS201-915M - Smart Fill Level Monitoring Sensor.
Product Description
WS201 is a wireless fill-level monitoring sensor for small containers, especially tissue boxes and toilet paper dispensers. Its Time-of-Flight (ToF) technology provides accurate, focused close-range detection. Ultra-low power consumption and hibernate mode help extend battery life.
A compact structure and internal damp-proof coating support stable operation in metal dispensers and bathroom environments. Built-in NFC simplifies configuration. With compatible Milesight LoRaWAN® gateways and Milesight Development Platform, users can monitor container status and remaining fill levels remotely. Applications include airports, hotels, shopping malls and scenic attractions.
Product Specifications
| Model | WS201-915M |
| Protocol | LoRaWAN®; OTAA/ABP Class A |
| Antenna | Internal |
| Frequency | 915 MHz variant; confirm regional plan. Family supports CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4 |
| Tx power | 22 dBm at 915 MHz |
| Sensitivity | -132 dBm @300 bps |
| Measurement | Time-of-Flight (ToF), non-contact |
| Detection range | 1–55 cm |
| Accuracy / Resolution | ±1 cm / 1 mm |
| Field of view | 25°; accuracy ±5° |
| Controls / Indicators | 1 internal reset button; 1 internal LED indicator |
| Configuration | Mobile app via NFC or LoRaWAN downlink |
| Advanced features | Threshold alarm; hibernate mode |
| Power | 1 × 590 mAh CR2450 lithium battery |
| Battery life | Up to 2 years advertised. Supplied datasheet estimates 3.6 years at SF7 (EU868/US915), 2.3 years at SF10 EU868, or 2.7 years at SF10 US915: 60-minute reporting, lack-of-paper alarm twice daily, 13 working hours/day, 25°C. Actual performance varies. |
| Temperature | -10°C to +60°C |
| Humidity | 0–95%, non-condensing |
| Protection | IP30; internal damp-proof coating |
| Housing | White, flame-retardant ABS + PC |
| Dimensions | 66 × 38 × 12 mm |
| Weight | 24.7 g with battery; 18.1 g without |
| Mounting | Flat surfaces with 3M tape |
| Approvals | CE, FCC; RoHS |
Product Features
- Focused ToF detection from 1 to 55 cm with high accuracy
- Non-contact detection with wireless deployment
- Reports remaining amount as a percentage with preset alarm thresholds
- Ultra-low power consumption and standby/hibernate mode extend battery life
- Ultra-compact design with NFC configuration for easy installation
- Adapts to most tissue boxes with stable wireless signal
- Internal damp-proof coating supports bathroom and other indoor environments
- Works with standard LoRaWAN® gateways and network servers
- Compatible with Milesight IoT Cloud and Milesight Development Platform
Package Includes
- 1 × WS201-915M Smart Fill Level Monitoring Sensor
- 1 × CR2450 lithium battery (device power supply)
- Mounting accessory contents to be confirmed with supplied package
Frequently Asked Questions
What is the WS201-915M - Smart Fill Level Monitoring Sensor. used for?
What are its main features?
What are the power or battery requirements?
Which interfaces or communication protocols does it use?
What is included in the package?
Other Information
Warranty Information
6 Months Seller Warranty
This item is covered with a standard warranty of 6 months from the time of delivery against manufacturing defects only. This warranty is given for the benefit of TwoElectrons customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.
What Voids Warranty
If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.
Shipping & Returns Policy
Shipping Policy:
- In-stock items are delivered within 7-10 working days for orders within India. Delivery varies based on location and courier service.
- In-stock items are delivered within up to 20 working days for orders outside India. Delivery varies based on location and courier service.
- If the item is out of stock, you can still place an order. The estimated delivery time will be notified to you by email.
Return & Refund Policy:
- Return window: 7 days from receipt unless stated otherwise.
- No refunds or replacements after the return window.
- Returns are accepted only for non-working or damaged products.
- Initiate return requests from here: Return Request or contact us at 09831070550.
- Refunds are processed within 3-4 working days after inspection and approval.
Main Features
- Suitable for diverse toilet paper dispensers
- Accurate fill-level monitoring with ToF technology
- Up to 2 years battery life with one coin-cell battery
- Wireless deployment and easy maintenance
Lead time
| QUANTITY | DISPATCH |
|---|---|
| 1-10 units |
Order from India: 7-10 working days Order outside India: Up to 20 working days |
| 10+ units | To be negotiated |
Protections for this product
Delivery via TwoElectrons Logistics
We aim to deliver your order within the scheduled dates, but delays may occur due to unforeseen circumstances.
Secure Payments
Your payment information is safe with us. TwoElectrons.com uses SSL encryption to ensure secure and reliable transactions.
Standard Refund Policy
You're covered! If your order doesn't ship, arrives incomplete, or has any product issues, you can claim a full refund.