+GF+ Signet
9900: Output Accessory
![9900: Output Accessory](/sites/default/files/styles/list/public/images/product/default/3-9900.398-1.jpg?itok=CbLpvGME)
The 4 to 20 mA Output Module adds a second 4 to 20 mA Output to the 9900 Transmitter (Generation III and later). Each of the outputs can be used to output the primary and/or secondary measurement.
9900: Relay Accessory
![9900: Relay Accessory](/sites/default/files/styles/list/public/images/product/default/3-9900.393.jpg?itok=ApkBTNpn)
Relay Module. This module adds two programmable dry-contact relays to the standard Open Collector output in the base unit.
Junction Box: NPT Mount
![Junction Box: NPT Mount](/sites/default/files/styles/list/public/images/product/default/3-8052-1.jpg?itok=UfuEGrQh)
3/4 in. NPT mount Junction Box contains two terminal blocks that enable cable extension for pH, ORP sensors
Sensors/Electrodes- 2751-1, 2751-3, 2751-4, 2839-2842(-1, -1D versions), 2350, 2450