ISO 18386:2025 PDF

Name: ISO 18386:2025 — Soil quality — Screening method for soil temperature — Measurement by infrared (IR) thermometer
SKU: ISO 18386:2025
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Soil quality — Screening method for soil temperature — Measurement by infrared (IR) thermometer

Название (английский):

ISO 18386:2025

Soil quality — Screening method for soil temperature — Measurement by infrared (IR) thermometer

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 5
Дата публикации:: 12 июня 2025 г.
Издание:: ISO IS 18386 edition 1 version 1
ICS:: 13.080.05

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Описание (английский):

This document specifies a method for quick measurement of soil temperature using an infrared (IR) thermometer. The method is applicable to a variety of technical fields, including geology, geotechnics, biology and agricultural sciences, as well as climate change studies and metrological investigation. Note The method designated in this document is recognized as a quick measurement in ISO 4974 and meets the definition of screening method as designated in ISO 12404:2021, 3.2.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 18386:2025 defines a screening method for soil temperature measurement using an infrared (IR) thermometer. The standard positions IR detection as a quick, non-contact approach for soil temperature that complements more accurate conventional methods. It is intended for use across geology, geotechnics, biology, agricultural sciences, climate studies and metrological investigation, and is recognized within ISO 4974 as a quick measurement and as a screening method per ISO 12404:2021.

Key Topics

Principle: IR thermometers estimate temperature from thermal (black‑body) radiation emitted by soil. A lens focuses IR radiation onto a detector, producing an electrical signal that is converted to temperature after ambient compensation.

Advantages: Rapid, remote (non‑contact) readings; useful where probe placement is difficult or where speed and hygiene are priorities.

Limitations: Readings can be affected by emissivity assumptions, IR attenuation, and reflected radiation from nearby hotter bodies; accuracy may be lower than contact thermometers.

Apparatus (examples from the standard):

Casing pipe with inner rod (commonly outer pipe i.d. 31 mm and inner rod o.d. 30 mm) to protect hole walls.
Shock‑absorbing (low‑rebound) hammer or wooden head maul for inserting casing.
Auger when hammer insertion is impractical.
IR sensor/thermometer (typical working range noted in the standard: about –10 °C to 80 °C).

Procedure highlights:

Drill a protected hole using a casing pipe; remove inner rod to reveal the hole while leaving outer pipe in place.
Apply IR detection either close to a target spot in the hole or from the top with appropriate focusing optics.
Follow manufacturer guidance on emissivity settings and ambient compensation.

Quality assurance: The document includes requirements for QA/QC and reporting to ensure consistent screening results.

Applications

ISO 18386:2025 is practical for field‑based, time‑efficient soil temperature surveys and screening campaigns where rapid spatial coverage is needed. Typical use cases:

Quick assessment of soil temperature for agronomy (crop germination and growth context).

Preliminary surveys in geology and geotechnics where many spots must be screened rapidly.

Supporting climate change and greenhouse gas flux studies by providing temperature context for microbial activity estimations.

Metrological investigations and situations where contact probes are impractical.

Benefits include reduced measurement time per spot, safer non‑contact operation, and easier logistics for large surveys. Users should weigh speed against the lower precision compared with contact thermometry.

Related Standards

ISO 4974 - Guidance on measurement approaches for soil temperature (discusses quick vs conventional methods).

ISO 12404:2021 - Definitions and guidance for screening methods.

Relevant ISO/TC 190 publications and national guidance for soil quality and temperature measurement.

For implementation, consult the full ISO 18386:2025 text for procedural details, QA/QC requirements and test report templates.

ISO 18386:2025 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

ISO 12404:2021

Soil and waste — Guidance on the selection and application of screening methods

BS ISO 4974:2023

Soil quality. Guidance on soil temperature measurement

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