YTS-M-1 Moisture Content Sensor

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The YTS-M-1 Micro‑Moisture Sensor is designed for continuous, rapid detection of water activity (aw) and dissolved water content (ppm) in lubricating and hydraulic oils. Its unique moisture sensing probe front‑end can real‑time capture the electrical characteristics of oil‑water mixture changes, and through a high‑precision temperature probe for data compensation, it obtains moisture content in oil via an optimized algorithm.

Key Measurements

Temperature: ‑40 – 120 ℃ (±0.3 ℃)
Water activity (aw): 0 – 1 a_w (±0.02 ‑ ±0.04 a_w)
Dissolved moisture content: 0 – 5000 ppm (±10%)
Long‑term stable operation in harsh environments

Description

Monitoring the micro‑moisture of lubricating oil and hydraulic oil in large‑scale continuous operation equipment, heavy machinery equipment and other equipment has an irreplaceable role in ensuring the normal operation of these key equipment.

Because the presence of moisture will damage the oil film, cause the failure of additives, cause corrosion of metal parts, shorten the service life of oil, and even cause unplanned shutdown of large machinery, causing serious safety accidents and economic losses.

For generator sets and transformers, moisture will destroy the insulating properties of the oil and pose a threat to the safety of power equipment and personnel.

Applications

Power Industry: monitor the insulation oil of transformers and reactors

Industrial Machinery: monitor the lubricating oil and hydraulic oil of mechanical equipment

Transportation: monitor the engine oil of ships and vehicles

Features

1
Continuous and rapid detection of water activity (a_w) in oil.
2
Accurately measure the micro‑moisture content (dissolved water) in oil.
3
Stable long‑term operation in harsh environments.
4
Compact structure, easy system integration, on‑site calibration of integrated modules.
5
High oil resistance and pressure resistance.
6
Supports multi‑mode signal output (RS485 / 4‑20mA / CAN 2.0B).

Specifications

Measurement Ranges

Parameter	Range	Accuracy
Water Activity (a_w)	0 – 1 a_w	±0.03 a_w
Moisture Content (dissolved water)	0 – 5000 ppm	±10% or ±10 PPM (the larger)
Temperature	‑40 – 120 ℃	±0.3 ℃
Flow Rate	0.3 m/s	Adjust valve if higher
Online Pressure	< 15 bar	Reduce valve recommended if higher

General Specifications

Item	Parameter
Liquid Temperature	‑40 ℃ – 120 ℃
Working Temperature	‑40 ℃ – 85 ℃
Power Supply	DC 24V ±10%
IP Rating	IP66
Signal Communication	RS485 / 4‑20mA / CAN 2.0B
Mechanical Interface	G 3/4
Cable Interface	M8×6pin
Material	Stainless steel 316
Dimension	Length 85 × φ34 mm
Weight	0.136 kg

YTS-M-1 vs YTS-W-1

Both sensors detect water in oil, but target different types:

Feature	YTS‑M‑1	YTS‑W‑1
Water Type	Dissolved (micro)	Free & Emulsified
Range	0–5000 ppm	0–10%
Best For	Transformers, turbines	Hydraulic systems

Standard Accessories

Sensor (YTS-M-1 unit)
Sensor Signal Cable

When to use YTS-M-1?

Use YTS‑M‑1 when you need to detect dissolved micro‑moisture — for example, in transformer insulation oil where even small amounts of water can compromise dielectric strength, or in turbine oils where ppm‑level water causes long‑term oxidation.