Soil Freezing Depth Frost Tube for Permafrost Monitoring

Key Features

Direct soil freezing depth measurement: Designed to measure the actual frozen layer depth in soil by observing the ice column inside the inner tube.
Multiple measuring ranges available: Standard options cover 500 mm to 4500 mm, suitable for shallow frost, seasonal frozen soil, and deep permafrost monitoring.
Simple structure and easy operation: No power supply, electronics, or complicated calibration required.
Durable outer tube design: The rigid rubber outer tube protects the inner tube and allows long-term buried installation.
Clear scale marking: The outer tube is marked with a 0 cm reference line and scale marks for convenient field reading.
Suitable for harsh outdoor environments: Applicable to cold regions, agricultural fields, roadbeds, research stations, and geological monitoring sites.
Low maintenance for long-term observation: The inner tube can be filled with clean local water and inspected periodically during frost seasons.
Wide application coverage: Suitable for meteorological observation, soil science, transportation engineering, agriculture, and permafrost research.

Product Description

1. Description

JW-DTSS(LC4) Soil Frost Depth Gauge is a simple and reliable instrument designed to measure soil freezing depth in meteorological stations, agricultural fields, roadbed monitoring, soil research, and permafrost observation projects. It consists of a rigid outer tube and a flexible inner tube filled with clean local water. When the soil freezes, the water column inside the inner tube forms an ice section, allowing users to directly read the frost depth through the graduated scale.

With measuring ranges from 0–500 mm to 0–4500 mm, this frost depth measuring instrument is suitable for different climate zones and soil freezing conditions.

2. Product Overview

JW-DTSS(LC4) is a manual frost depth measuring instrument used to determine how deep soil has frozen during cold seasons. It is commonly installed vertically into the ground before freezing conditions occur. The device uses a water-filled inner tube to reflect the freezing condition of the surrounding soil.

When the soil temperature drops below freezing, the water inside the tube freezes at the corresponding depth. By removing the inner tube and checking the frozen section, operators can read the soil frost depth clearly and accurately. This makes the instrument especially useful for long-term meteorological observation and frozen soil research.

The gauge is available in several length specifications, allowing users to select the correct model according to local maximum frost depth.

Item	Measuring Range	Minimum Division	Total Outer Tube Length	Exposed Outer Tube Length	Scale Accuracy
1	0–500 mm	10 mm	1060 ± 2 mm	500 mm	±10 mm
2	0–1000 mm	10 mm	1575 ± 2 mm	500 mm	±10 mm
3	0–1500 mm	10 mm	2075 ± 2 mm	500 mm	±10 mm
4	0–2000 mm	10 mm	2575 ± 3 mm	500 mm	±10 mm
5	0–2500 mm	10 mm	3075 ± 3 mm	500 mm	±10 mm
6	0–3000 mm	10 mm	3575 ± 4 mm	500 mm	±10 mm
7	0–3500 mm	10 mm	4075 ± 4 mm	500 mm	±10 mm
8	0–4000 mm	10 mm	4575 ± 5 mm	500 mm	±10 mm
9	0–4500 mm	10 mm	5075 ± 5 mm	500 mm	±10 mm

3.Product Structure

The frost depth gauge is mainly composed of:

Component	Description
Outer Tube	Rigid rubber tube with scale marks and 0 cm reference line
Inner Tube	Flexible rubber tube filled with clean local water
Chain or Copper Wire	Used to hold and observe the frozen water column
Short Metal Tube	Connected to the top of the inner tube
Wooden Rod	Assists handling and positioning
Iron Cap	Protects the top structure during outdoor use

4.How It Works

Before installation, the inner tube is filled with clean local water up to the 0 cm mark. The instrument is installed vertically into the soil. During freezing conditions, the water inside the tube freezes according to the surrounding soil temperature profile.

When checking the frost depth, the operator removes the inner tube and identifies the frozen section. The length of the frozen water column indicates the soil freezing depth.

This measurement principle is simple, reliable, and suitable for long-term outdoor field monitoring.

5. Application Scenarios

Meteorological Observation: Used by weather stations and climate monitoring sites to record seasonal soil freezing depth and support long-term climate data collection.
Agricultural Soil Monitoring: Helps evaluate frozen soil conditions in farmland, orchard nurseries, cultivated land, and greenhouse surroundings, supporting irrigation scheduling and spring planting decisions.
Roadbed and Infrastructure Monitoring: Suitable for highways, railways, embankments, and construction sites where frost heave and frozen soil depth may affect foundation stability.
Permafrost and Soil Research: Used in cold-region research, geological exploration, environmental monitoring, and permafrost investigation projects.
Water Conservancy and Hydrology Projects: Applicable to soil freezing studies around reservoirs, riverbanks, irrigation areas, and water engineering facilities in cold regions.

FAQ

Q

1. What is a soil frost depth gauge used for?

A

A soil frost depth gauge is used to measure how deep the soil has frozen. It is commonly used in meteorology, agriculture, roadbed monitoring, soil research, and permafrost studies.
Q

2. How does the frost depth gauge work?

A

The inner tube is filled with clean local water. When the surrounding soil freezes, the water inside the tube freezes at the corresponding depth. The frozen section can then be read against the scale to determine soil freezing depth.
Q

3. What measuring ranges are available?

A

Available measuring ranges include 0–500 mm, 0–1000 mm, 0–1500 mm, 0–2000 mm, 0–2500 mm, 0–3000 mm, 0–3500 mm, 0–4000 mm, and 0–4500 mm.
Q

4. Can JW-IoT provide this frost depth gauge for meteorological projects?

A

Yes. JW-IoT can provide frost depth gauges for meteorological observation, frozen soil monitoring, agricultural research, and cold-region environmental monitoring projects.
Q

5. Is this instrument suitable for permafrost monitoring?

A

Yes. The gauge is suitable for seasonal frozen soil and permafrost observation, especially in cold regions where manual frost depth readings are required.
Q

6. Does the frost depth gauge require power supply?

A

No. It is a manual mechanical measuring instrument and does not require batteries, solar panels, or external power.
Q

7. Can JW-IoT recommend the correct measuring range?

A

Yes. JW-IoT can help select the appropriate measuring range based on local historical frost depth, installation depth, soil type, and project application.
Q

8. What industries commonly use this product?

A

It is widely used in weather stations, agricultural monitoring, soil science research, road and railway engineering, geological exploration, and water conservancy projects.
Q

9. Can this product be used with other JW-IoT monitoring systems?

A

Yes. The JW-IoT frost depth gauge can be used together with soil temperature sensors, weather stations, data loggers, and IoT platforms to support complete frozen soil monitoring solutions.