NESA SPP Rain detection sensor



Product Introduction
Product Features
Technical Details
Product Introduction

The rain sensor allows to determine the exact time when there is rainfall or snow. Thanks to a special heating system on its surface, water evaporates in a few moments, so is also possible to determine the duration of the event which featured the precipitation. The sensor is equipped with a stainless steel grid gold plated which through a conductivity measurement detects the presence of water on its surface and closes a contact (relay) that can be recorded by a datalogger.

  • Strong and reliable rain sensor
  • Automatic heating in case of rain or snow
  • Integrater relay with status led (2A@24Vdc max load)
  • Easy to clean up and maintain

Product Features

  • Precipitation detection sensor with heating
  • According to standard WMO
  • Robust and compact design
  • Easy to install and low weight
  • Electrical output: relay – dry contact
  • Operating conditions: -30 to + 60 ° C
  • Power supply: 10 to 18Vdc

Technical Details

Detection Area

~ 10cm2

Operating range

(Dry / Wet)

Time constant

<1 sec (medium time)

Working temperature

-30 ÷ 60°C

Standard signal output

on/off with dry contact (max 2A/24Vdc)


Polarity reverse and transient

Made of

Reinforced resin and gold foil

Power  consumption

10÷18 Vdc ; 8÷150mA@12Vdc (with/ without heating)



Dimensions and class of protection

64x44x36 mm (LxWxH): IP65


Standard cable

Shielded multi-core cable for indoor/outdoor use, suitable for hot and cold climates.

With IP68 waterproof connector for connecting the sensor, and PS2 plug connector for direct connection to the data logger or with terminal sleeves for insertion into the terminal blocks.

Our cables are standard for most our sensors.

Available in different lengths starting from 1m.

Special Cable

NPI shielded cable. With IP68 waterproof connector for connecting to the sensor, and terminal sleeves for insertion into the terminal blocks.

Available in any length.

Bracket / Arm Support

Fixing system for Nesa’s sensors, composed by an arm of different lengths (50cm, 90cm, 150cm) and thermoplastic resin clam for external, able to withstand to extreme temperature and to solar radiation.

Two stainless steel screws for the tightening of the clamp on the sensor complete the equipment.

MCS Signal Conditioning Module

Single channel module for conditioning digital and analog electrical signals. Fully programmable for binding input/output with the USB interface available as an option.

·       Programmable input signals: Pt100, thermopiles, Voltages up to 2Vdc, Current 0÷20mA or 4÷20mA, frequency up to 1000Hz, Counter for pulses (1ms min)

·       Programmable Output signals: voltage 0÷2Vdc; Current 0÷20mA or 4÷20mA Serial RS485 (command line); Modbus RS485

·       Resolution: 18 bits with over 262,000 points

·       Operating conditions: -40 ÷ +80°C

·       DIN rail mounting

·       Power supply: 10÷30Vdc (typ. 4mA@12 Vdc)