500m Underground Water Level Detector Stainless Steel Borehole Deep Well Meter

• Customization: Available
• After-sales Service: Available
• Warranty: 1 Year Without Huaman Damage
• Model NO.: WLM5
• Ruler Length: 350m
• Ruler Cable: Blue
• Coating: PE,PU
• Conductor: Steel Wire
• Lead Time: 3 Days
• Power: 9V Battery
• Probe Diameter: 14mm
• Probe Length: 220mm
• Transport Package: Carton
• Specification: 0-30m,0-50m,0-100m,0-150m,0-200m,0-250m,0-300m
• Trademark: no
• Origin: Shanghai, China
• HS Code: 9026100000
• Production Capacity: 5000/1 Month
• Package Size: 58.00cm * 65.00cm * 35.00cm
• Package Gross Weight: 26.000kg
• Lead Time: 18 days (1 - 100 Pieces) ; To be negotiated ( > 100 Pieces)

Product Description

 

500m/600m/650m/700m Borehole Depth Meter Water Level Indicator High Precision Stainless Steel Probe LED/Buzzer Alarm for Well & Geo technical Surveys

shell material	Metal
Shell color	blue, yellow, black,red
Measurement range	30m, 50m, 100m, 150m, 200m, 250m,300m, 350m, 400m, 450m, 500m
battery power	9V lithium battery
Instrument for temperature	-20ºC~+60ºC
The response time for output	≤1ms
Measurement error	≤±0.5mm
Adaptation range of water quality	10μω~1000μω
Measurement signal	LED, buzzer
construction of cable	conductor: Multi-strand tinning copper wires twisted core wire:Special PP mixed insulation ecderon:Special PUR or PE mixed ecderon color :natural color
rated voltage	300V
Testing Voltage	2000V
insulation resistance	>200MΩ×km

 

This heavy-duty borehole depth meter is designed for geotechnical, hydrological, and mining surveys, offering high-precision water level measurements in wells, boreholes, and reservoirs. With a stainless steel probe and LED/buzzer alarm system, it ensures reliable detection of water levels up to 700 meters deep, replacing outdated manual methods like tape measures or rudimentary electrical test

 

1. Wide Measuring Range

   • Available in 500m, 600m, 650m, and 700m depth configurations, with optional customization for deeper wells 

   • ±0.1% accuracy (≤±10cm per 100m), meeting ISO standards for professional-grade water level detection 

2. Durable & Corrosion-Resistant Probe

   • 14mm stainless steel probe with ±5mm sensitivity, ensuring long-term reliability in harsh environments 

   • Epoxy-sealed and waterproof design for consistent performance in flooded boreholes

1. Instant Detection with LED/Buzzer Alarm

   • Audible buzzer + LED indicator for clear water-level confirmation, even in noisy field conditions 

   • Peak voltage display mode for precise readings in low-visibility settings 

2. Portable & User-Friendly

   • Lightweight (1.5kg-6kg, depending on model) with a compact carry case for fieldwork 

   • 9V battery-powered (low ~15mA consumption) with auto-shutdown to conserve energy

 

1. Robust Cable & Safety Features

   • 2.0mm Ø steel-reinforced cable with 25kg break resistance and HDPE insulation for abrasion resistance 

   • Wide operating range: -20°C to +70°C, suitable for extreme climates 

General description

Water level meter provide an accurate measurement method of level meter, usually used for the measurement of water level in the drilling holes or water level pipe ,particularly suitable for hydropower engineering underground water level or artificially inspection dam observation.This instrument can be used in constructio period,but also can be used as the long-term safety monitoring project. comply with the dam safety monitoring technology standard(SL60-94)       

Working principleThe measurement of the water level by the following two parts: 1. Underground material, it is composed by water level pipe and bottom cover (not include in the system,it is need purchased separately) Ground receiver-ruler water level meter, it is composed by detect head, ruler cable, receiver system and cable reel. Detect head: made by steel, inside is a water resistance contact point. When the contact point contact water, the receiver system will open, and when the contact point leave the water,the receiver system will close. Ruler cable: it made by ruler and cable, and use plastic technology keep them together, and avoid the steel corrosion and simple the operation,make the read more convenient and accurate. Receiver system:it is composed by sounder,indicate light. 2 the green button in the panel is test button, when push this button, light on and buzzing, that indicate the circuit is in good condition. Or else, the circuit have problem or the battery has no power. 

Use method
In measuring, make the cable reel rotate and push the power button,put the detect head in the water pipe, put the ruler cable in hand and make it drop slowly. When the detect head contact point contact water, the receiver system buzzer will sound. Then you can read the data of the ruler cable and can know the water level.(if the surrounding voice is loudly, maybe you can hear buzzer,so you can observe the indicate light and voltage meter)

Maintenance Because the system use battery to supply power, so when you finish test,you should keep it power off.Power supply is 9V,when it has no power,you should open the cover and change it. After measurement, please keep the detect head and cable clean, cable rolled in cable reel. And put them in a good condition. Unauthorized disassembly of the product, it can not put in water horizontally, the cable cannot bucking,especially the ends. The detect head should carry and put softly and avoid vibration.

StorageCustomer should open the box and check the product when you receive it. 
Storage temperature-10~+40ºC,humidity less than80%,no aggressive gas. 
Product warranty:1year.

special characteristics

1.Provide an accurate method of measuring water level.Usually used for measuring Wells, drilling and water pipe water.

2.Good physical and chemical properties, oil resistance, chemical corrosion resistance, abrasion resistance,
3.resistance to hydrolysis and microbial resistance;good low temperature performance, working temperature 40 ºC to + 90 ºC.

Applications

• Geotechnical surveys: Monitor groundwater levels in boreholes and dams 

• Mining & hydrology: Measure water ingress in shafts and wells 

• Civil engineering: Inspect reservoir levels and infiltration rates 

Why Choose This Depth Meter?

• ISO-compliant precision outperforms manual methods 

• Stainless steel probe resists corrosion in saline/acidic conditions 

• Battery-efficient with 5+ years of field-proven reliability