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A757 addPULSE was developed with hydrographical services in mind, that are required to establish dense networks of rain gauge stations to improve flood warning and civil protection. Nonetheless this RTU is as suited to monitor rain in other applications such as agriculture.

A757 features only one port to connect to a pulse output of e.g. a rain gauge or a water meter. The RTU can collect data in two different ways: either pulses are totalized over a user-programmable time slot, or every single pulse is time-stamped, a requirement for rain intensity monitoring.

Data transmission is done through the integrated Motorola quad-band GSM/GPRS modem.


Technical Specifications - Mechanics

Case Aluminum, powder coated
Protection class IP-67
Dimensions and weight

160 x 60 x 80 mm / 6.3 x 2.4 x 3.1 inches
1150g / 2.4lb.

Connectors for sensors and power

Made in Germany by Binder
IP-67 protection class
Sockets: brass, nickel plated
Socket contacts: gold plated
Protective cap
1 x M9 female 7-pin to sensor
1 x M9 female 5-pin to power

Antenna connector TNC with external seal, water tight , Made in Germany
Mounting Mast mounting bracket integrated
Operating temperature

-20°C ... +65°C / -4°F ... +149°F
-30°C ... +75°C / -22°F ... +167°C extended temp. range upon request


Technical Specifications - Logger

Counter Inputs

1 for standard reed contacts; electronically debounced, e.g. for rain gauges; max frequency up to 30 pulses per second; min. pulse length 17ms, min. break time 17ms

Rain Intensity Monitoring Date and Time of every single pulse are stored; max. resolution: 1 second
Memory 2MB for up to 500.000 readings, depending on the programmed operating mode (totalizer or time stamping)

Technical Specifications - Data transmission

Frequencies 900 & 1800 MHz (Europe) and
850 & 1900 MHz (Americas)
Modem Motorola G24L
SIM-Cards small footprint
Security SIM-Cards are PIN-Code protected
Connection types - GSM: CSD Circuit Switched Data
GPRS Connect Frequency User selectable:
- permanent connection
- connect from 1 x per minute to 1 x per day
Antenna Omnidirectional, TNC, +2dBi, waterproof

Technical Specifications - General

Power supply internal 6.2V battery, charged by solar panel or mains adaptor
Battery Panasonic High-Temperature Industrial Grade NiMH battery, 3100mAh
Type approvals

FCC, R&TTE, CE, Industry Canada, ACMA Australia

Related Categories
Water Quality Multiprobes
Water Level Sensors
Weather Stations
Soil Moisture
Data Services