The automatic precipitation sampler NSA 181/K has three optional types, namely NSA 181/KE, NSA 181/KD，NSA 181/KS， The difference lies in the number of sample collection bottles and the collection method, as shown in the following table:

type	Number of sample bottles	Capacity (ml)	texture of material	heating	Precipitation distribution device	selection
NSA 181/KE	1	5000 or 10000	HD-PE	Collection room heating	nothing	Used for mixed sampling
NSA 181/KD	2	5000	HD-PE	Sample bottle bottom Part heating	Yes, rotating head Controlled electronically	Used for biweekly Independent sampling
NSA 181/KS	9×2	1000	HD-PE	Sample bottle bottom Part heating	Yes, rotating head Controlled by pulse	Used for 8 days Independent sampling

NSA 181/KHE, NSA 181/KHD, NSA 181/KHS are models that are equipped with snow covers on top of NSA 181/KE, NSA 181/KD, NSA 181/KS, and are suitable for areas with heavy snowfall.

Instrument principle:

After the precipitation begins, the precipitation sensor RS 85 emits a pulse signal and opens the funnel to collect samples. Open the funnel, move the lid outward, rotate it to both sides, and then lower it to prevent aerodynamic interference with the sampling process. The precipitation collected in the funnel flows directly into the collection bottle (E-type) through the pipeline or into a circular funnel and then into the rotary head (D or S-type) through a hose. The rotary head is connected to each hard polyethylene sample bottle through a drainage pipe and a silicone hose. When the precipitation stops, the precipitation sensor RS 85 and an adjustable heating component send signals, and the motor drives to close the collection funnel.

For NSA 181/KD or NSA 181/KS, the precipitation collected in the funnel flows into a circular funnel through a pipeline and then into the rotary head through a hose. The rotating head is connected to a single hard polyethylene sample bottle through a drainage pipe and silicone hose. By SIEMENS ® LOGO ® Program control drives the motor to lift the annular funnel, and the collected precipitation flows into the sample bottle through the connected open rotating head's channel. If the external power supply is disconnected, all switch points will automatically connect. The battery will immediately provide power to the timing and rotating head control, supporting at least 24 hours of operation to ensure the replacement of sample bottles.

to configure:

Standard configuration

Double layer insulated PVC box

Polyethylene funnel

Electronic control components used to control the opening and closing of covers

Funnel and sample bottle heating device

Precipitation sensor RS 85

Optional configuration

DURAN glass or Teflon plastic sample bottle

Duran glass or Quarz glass funnel

Three bottle collection system

Optoelectronic precipitation sensor IRSS 88

Precipitation sensor NRS 80 or RS 85 OP, used in areas without snowfall

Snow cover (option "H")

PE or DURAN glass dry sample container

LCD timer

Data recording system

Base, made of galvanized steel material

Multiple signal circuit boards

Specific parameter table for each model of the NSA 181/K automatic precipitation sampler:

Based on the precipitation collector NSA 181/K series, users can customize special designs:

Technical features:

The precipitation sampler is used to collect precipitation, and according to its own design and construction, it adopts one large capacity sample bottle or eight independent sample bottles for daily or weekly sample collection. After the experimental analysis and measurement are completed, each sample bottle can be easily removed from the equipment. Each measuring element inside the constant temperature isolation box of the equipment is made of chemically neutral materials. The box adopts an automatic ventilation design, which reduces the high temperature impact caused by strong solar radiation. The electronic control heating device for the funnel and sample bottle operates in winter. The direct material, funnel shape, and collection area comply with the recommended standards of VDI-3870 (VDI: German Institute of Engineers).

The cooling principle is to install an automatic cooling defrosting device at the bottom of the collector. By using a plate type evaporative ventilation cooling device, the cooling temperature can be maintained at 4~6 oC in high-temperature environments.

advantage:

The difference between the NSA 181/K model and the NSA 181 Basic model is that they are designed with an automatic sampling room temperature control system, which is generally controlled between 4~6 ℃ (with an adjustable range of 3~10 ℃)

Small instrument, module combination structure

Insulated PVC box body

High sensitivity precipitation sensor RS 85

A funnel with a collection surface area of 500 cm2

Selection of sample bottles suitable for multiple sampling modes

Fluoride free cooling (FCKW) device

SIEMENS ® Technical electronic control

Electric heating system