Neptune Systems PM1, pH or ORP, Temperature, I/O Expansion Box
The first expansion module, the PM1 (shown above) , with a pH or ORP, temperature, and 6 digital inputs.
The PM1 features are:
* Monitor/Control pH or ORP, and temperature.
* 6 digital inputs for float switches, water on floor sensors, pressure sensors, etc.
* Full datalogging support in Apex Base module.
* Up to 240 AquaBus modules can be added to the Apex system.
* Plug and Play. Automatically recognized when installed into the system.
* Two AquaBus connectors for flexible expansion via AquaBus
* Led Status Indicator
* Upgradeable firmware.
* Compatible with Apex and Apex Lite systems.
* Galvanic Isolation for accurate and reliable probe readings.
* Comes with 3' AquaBus cable.
Neptune Systems PM1, pH or ORP, Temperature, I/O Expansion Box
The first expansion module, the PM1 (shown above) , with a pH or ORP, temperature, and 6 digital inputs.
The PM1 features are:
* Monitor/Control pH or ORP, and temperature.
* 6 digital inputs for float switches, water on floor sensors, pressure sensors, etc.
* Full datalogging support in Apex Base module.
* Up to 240 AquaBus modules can be added to the Apex system.
* Plug and Play. Automatically recognized when installed into the system.
* Two AquaBus connectors for flexible expansion via AquaBus
* Led Status Indicator
* Upgradeable firmware.
* Compatible with Apex and Apex Lite systems.
* Galvanic Isolation for accurate and reliable probe readings.
* Comes with 3' AquaBus cable.
Item No. CT-NS-PM1
3 Reviews
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Works great
Works great, I added one to my Apex system to monitor my ALK via the Alcatronic.
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Extra ports for apex system
I mainly purchased this to add another temp sensor to my system. Also, added another i/o port which you can use to add another breakout box. Finally, another pH port is nice, if you want to have another pH measurement from you tank or sump. Overall useful module and I have experienced no issues with it to date.
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Don't forget the temp probe
Works great - I added one to my Apex system to monitor my Calcium Reactor pH. If you want to use the temperature function, don't forget to purchase a temperature probe. This unit doesn't come with one.
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Neptune Systems PM1, pH or ORP, Temperature, I/O Expansion Box 
this review is more on Aqua Cave. Received a new Neptune PM1 module from AquaCave that was missing the mounting bracket. I contacted AquaCave and they were of little to no assistance in helping me. Here were my issues (1) AquaCave was not even aware that the mounting for the PM1 module had change (2) wasn't aware that the picture of the PM1 module on their website was outdated and (3) told me to contact Neptune directly to get the missing part. Ironically when I contacted Neptune they told me the replacement part was going to come directly from Bulk Reef Supply. Learning for me....just order stuff directly from BRS and don't have any hassles!
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