Overview
ISO 19932-2:2013 specifies test methods for verifying the requirements of ISO 19932-1 for knapsack sprayers used with plant protection products. It covers lever-operated, compression and engine- or motor-driven knapsack sprayers that use hydraulic pressure atomisation and have a nominal volume > 3 L. The standard is intended primarily for agricultural and horticultural applications and explicitly excludes knapsack mistblowers (see ISO 28139).
Key topics and technical requirements
ISO 19932-2 sets out laboratory and bench test procedures to confirm safety, durability and environmental performance. Important technical areas include:
- Test liquids and equipment - requirements for test water, measuring cylinders, timers, pressure supplies and example test devices (preconditioning, shut-off, strap, drop and filling devices).
- General test conditions - ambient conditions, specimen preparation, assembly and initial inspection.
- Functional tests:
- Shut-off device reliability - cyclic operation under pressure to detect failures and leakage.
- Spray liquid output - measurement of output rate at specified pressures and verification against handbook values.
- Load-carrying straps and fixation points - dynamic strap/drop tests to assess attachment durability.
- Stability - checks on tipping/standing stability empty and full.
- Contents gauge and total volume - accuracy of tank graduation marks and determination of total/nominal volume.
- Filling rate and splash/splatter - controlled fill procedure and measurement of spilled/splashed liquid.
- Pressure and leakage tests, centre of gravity, and emptying procedures.
- Specific tests by sprayer type - additional preconditioning, drop and deposit/residual liquid tests tailored for lever-operated, engine-driven and compression sprayers.
- Test reporting - minimum content for test reports (normative Annex F) and informative examples of test devices (Annexes A–E).
Applications and users
ISO 19932-2 is practical for:
- Manufacturers and designers validating product performance and compliance with ISO 19932-1.
- Test laboratories and certification bodies performing type testing, quality control and conformity assessment.
- Regulators and procurement officers specifying performance requirements for agricultural equipment.
- R&D and safety engineers improving ergonomics, leak prevention and environmental containment.
Using these test methods helps ensure operator safety, reduce unintended dispersal of plant protection products and support reliable product claims.
Related standards
- ISO 19932-1:2013 - Safety and environmental requirements (verification target).
- ISO 5681:1992 - Crop protection vocabulary used for terms and definitions.
- ISO 28139 - Knapsack mistblowers (excluded from ISO 19932-2 scope).
- References such as EN 837-1 appear for pressure gauge class specifications within the test methods.
Keywords: ISO 19932-2, knapsack sprayers, test methods, crop protection equipment, agricultural sprayer testing, safety and environmental requirements.
