L921 Smart Single Phase Controller with Advanced Dry Run Protection Features

• Customization: Available
• Task: Program
• Structure: Closed-Loop
• Model NO.: L921
• Signal: Continuous
• Function: Automatic Control
• Certification: ISO: 9001, CE
• Condition: New
• Customized: Customized
• Material: ABS
• Transport Package: Paper Carton
• Specification: 6 pcs/carton
• Trademark: Neutral
• Origin: China
• HS Code: 9032899090
• Production Capacity: 100000PCS/Year
• Package Size: 44.00cm * 33.00cm * 18.00cm
• Package Gross Weight: 5.000kg

Product Description

Product Description

NO.1 About Product

Description
Introducing the High-Quality Electric Single Pump Control Panel (L921), tailored for the discerning Water Pump Distributor
The L921 Pump Controller stands as a beacon of innovation-a smart, intelligent single-phase fully automatic pump controller, featuring advanced water level detection.

This indispensable tool shines across water and wastewater sectors, whether it's for water transfer, tank filling, tank emptying, or pressure boosting in Hydro-pneumatic systems. Housed in a durable ABS enclosure, it's designed for weather-proof installations and accommodates both Auto and Manual operations.

Parameter form

General details
Model	L921
Main technical data
Start type	Direct on line
Qty of controlled pump	Single pump
Rated input voltage	AC220V-240V Single phase 50HZ/ 60HZ
Rated output power	0. 37kw-2.2kw (0.5hp-3hp) 3kw-4kw (4hp-5.5hp)
Capacitor	Reserved space for installing stsrt capacitor
Protection function	Over load protection Pump stalled protection Dry run protection with sensor free Under voltage protection Over voltage protection Repeat start protection
Application & Control characteristic	Control and protect general pump Using water level sensor , float switch or pressure switch or level/pressure transmitter to control pump start and stop Applied for water supply by liquid level control through float switch or liquid probe Applied for water supply by pressure control through pressure switch and pressure tank Applied for drainage by liquid level control through float switch or liquid probe
Other features	Pump last five faults record displaying Pump accumulative running time displaying Pump shaft anti-rust Present one dry contact point(BA port) LCD screen locked function under anto state Present RS485 port Present user remote monitor Push button calibration
Main installation data
Working temperature Working humidity Degree of protection Install position Unit dimension (L x W x H)	-25ºC-- +55ºC 20%--90%RH, no drips concreted IP54 Wall mounting 310×220×120mm

Typical Application Example


Typical usage scenarios include
-Residential Homes
-Apartments
-Vacation Residences
-Agricultural Farms
-Water Extraction from Wells
-Greenhouse, Garden, and Agricultural Irrigation
-Rainwater Harvesting and Reuse
-Industrial Manufacturing Plants
-Waste Water Management / Sewage Systems

NO.2 About us

1) Company Information
Brief Introduction
Since its inception in 2001, Hunan Leading Science & Technology Development Co., Ltd. has been at the forefront of pioneering pump control and protection solutions for users worldwide.
Today, we proudly offer an extensive array of pump control panels and accessories, tailored to meet the diverse demands of the control and protection market.

Our diverse product line includes: Intelligent Pump Controllers, Sewage Pump Controllers, Booster Pump Controllers, Deep Well Pump Control Units, Submersible Pump Controllers, Pump Motor Starters, Programmable Logic Controllers, IoT Pump Controllers, and Reverse Osmosis Controllers.

For more insightful details, please visit: pumpcontroller.en.made-in-china.com

Our office & Team

Hunan Leading Science & Technology Development Co., Ltd. is structured into three dynamic departments:
1. The Sales Team
2. The R&D Team
3. The Production Team
Our Sales Team gathers crucial insights and technical needs from manufacturers, distributors, and users, which are then meticulously considered by our R&D Team. Following thorough analysis, research, development, and testing, the finalized pump controller moves to our Production Team for manufacturing.

Through seamless collaboration among our departments, Hunan Leading Science & Technology has forged many groundbreaking control and protection technologies within the pump industry.

2) Our Trading Fair & Communication & Feedback

NO.3 Our production capacity

We cordially invite you to experience our innovation firsthand with a factory field trip.

N0.4 FAQ
Can I obtain samples?
Absolutely, we would be pleased to provide samples for your evaluation. Please reach out to us for further information.
What is the typical delivery time?
For our standard pump control panels, you can expect delivery within approximately 7 working days;
For non-standard configurations, the process typically takes 15-20 days. Kindly contact us for more specifics.
Is OEM or ODM service available?
Certainly, with our dedicated engineering team, we are well-equipped to handle OEM and ODM requests, subject to minimum order requirements.
How does your factory ensure top-notch quality control?
Our production process adheres to the rigorous ISO standards, meticulously managing product quality from raw materials to the final product. Every control panel is thoroughly assembled and subjected to stringent testing prior to packing and shipping.
What is the expected lifespan of your control panel?
The control panel is engineered for a lifespan of approximately 8 years.
What is your policy on after-sales service?
Depending on the order quantity, we provide complimentary spare parts or controllers for maintenance or replacement, along with comprehensive technical training.
Why should I place my trust in your company?
With 15 years of expertise in manufacturing and selling pump control panels, our controllers are trusted by numerous pump suppliers in China and internationally for efficient pump and motor management and protection.
Where is your location and transportation guide?
Traveling from Guangzhou to Changsha takes approximately 1 hour by air or 2.5 hours by high-speed train.
From Shanghai to Changsha, the journey is 1.5 hours by air or 5 hours by high-speed train.
The route from Beijing to Changsha takes 2.5 hours by air.
A flight from Hong Kong to Changsha lasts around 2 hours.

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