GW-200 Handheld Temperature Reader

The GW-200 is a portable hand-held temperature reader that is part of the GrainWatch™ temperature monitoring product range. It is intended for facilities where the temperatures are to be monitored manually.

The GW-200 is easy to use. Just plug in, press any of the two buttons and temperatures are presented on the backlit display. Power is supplied by two standard AA batteries.

The GW-200 can read up to 32 sensors per sampling cycle and access point. These sensors may be divided between several temperature cables or spears. More than 32 sensors require multiple access points.

Recommendations

When used for silo storage, the GW-200 interfaces with GWSL1100 or GWSL2100 temperature cables suspended from the silo roof. Standard sensor spacing is 2 m or 3 m. Every access point is limited to:

  • 32 sensors in total
  • 200 m maximum cable length (including the temperature cables)
  • max 4 temperature cables per access point

When using multiple temperature cables connected to one access point, it is necessary to program the sensors inside the temperature cables in one continuous sequence from sensor no. 1 – 32, since every sensor ID needs to be unique (e.g. cable 1: sensors 1-5; cable 2: sensors no. 6-10; cable 3: sensors 11-15, etc.). The temperature cables do not need to have the same amount of  sensors.

When used in flat storage, the GW-200 preferably interfaces with temperature spears GWTL-R of the GrainWatch product range. Multiple spears can be daisy chained and connected to one access point. Every access point is limited to:

  • 32 sensors in total
  • 200 m maximum cable length (including the temperature spears)
  • max 10 temperature spears per daisy-chain.

As with temperature cables, it is necessary to program the sensors inside the temperature spears in one continuous sequence from sensor no. 1 – 32, since every sensor ID needs to be unique.
(e.g. spear 1: sensors 1-3; spear 2: sensors no. 4-6; spear 3: sensors 7-9, etc.). The temperature spears do not need to have the same amount of sensors.

Rugged handheld temperature monitoring unit with two intuitive buttons and backlit display. Enables easy handling and reading, even in dimmer locations.

The reader is connected via its 3.5 mm plug. At the push of a button you get the temperature readings from all sensors, from the bottom to the top. After reading the temperature values, the GW-200 automatically displays the sensor with the highest temperature value. The buttons enable scrolling between sensors.

Runs on two AA-type batteries.

Upgrading the Grain-Watch system from a hand-held to PC or mobile app is easy — the modular configuration and the use of the same high quality digital sensors in both cables and lances make expansion easy.

Since the GW-200 interfaces to the same type of digital sensors used in all GrainWatch equipment, upgrading to an automatic system is easy. Systems using the GW-200 are not ATEX-approved, but upgrading to an automatic system ensures ATEX compliance.

Type name: GW-200 handheld temperature reader. Interfaces with temperature spear GWTL-R and temperature cables GWSL1100 and 2100.
Dimensions: 200 mm * 95 mm * 40 mm
Weight: 240 g (including batteries)
Material: ABS
Power: 2 * standard AA size batteries
Battery life: Aproximately 1 year
Operating temperature: -20°C – +40°C