This product is no longer available and has been replaced by: PS150.
PS100 12 V Power Supply with Charging Regulator and 7 Ah Rechargeable Battery
Services Available
Repair Yes
Calibration No
Free Support Yes


The PS100 provides a 12-Vdc, 7-Ah rechargeable power supply for the CR500, CR510, CR800, CR850, CR10, CR10X, and CR1000 dataloggers and peripherals. The rechargeable battery can be trickle-charged from ac power (requires optional wall charger) or from an external solar panel. The user can add an external rechargeable battery.

Read More


Detailed Description

The PS100 can also be used as a separate auxiliary 12-V power supply to power remotely located sensors or peripherals, such as a multiplexer located at a distance from the data logger enclosure. However, to avoid errors in analog measurements and ground loops, the power supplies must share a common ground.


input Voltage (CHG Terminals) 15 to 28 Vdc or 18 Vac RMS
Charging Output Voltage Temperature compensated float charge (for 12 V battery)
Charging Current Limit 1.2 A (typical)
Power Out (+12 Terminals) Voltage Unregulated 12 V (from battery)
Nominal Rating 7 Ah
Dimensions 10.5 x 19.3 x 7.1 cm (4.1 x 7.6 x 2.8 in.) including mounts and connectors
Weight 3.1 kg (6.9 lb)
Battery Weight 2.7 kg (5.9 lb)

Quiescent Current

Charge Source Present 3 to 5 mA
No Charge Source Present 0 mA


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired) Typically, a CR23X, CR3000, or CR5000 datalogger uses its integrated rechargeable base instead of the PS100. However, the PS100 can be used if the data logger has a low-profile base or if the battery base has been disconnected.
CR295X (retired)
CR3000 (retired) Typically, a CR23X, CR3000, or CR5000 datalogger uses its integrated rechargeable base instead of the PS100. However, the PS100 can be used if the data logger has a low-profile base or if the battery base has been disconnected.
CR500 (retired)
CR5000 (retired) Typically, a CR23X, CR3000, or CR5000 datalogger uses its integrated rechargeable base instead of the PS100. However, the PS100 can be used if the data logger has a low-profile base or if the battery base has been disconnected.
CR510 (retired)
CR9000 (retired)
CR9000X (retired)

Power Supplies

Product Compatible Note
SP10R-L (retired)
SP20R-L (retired)

Mounting Equipment

Product Compatible Note


Product Compatible Note

Additional Compatibility Information

Enclosure Considerations

A desiccated, non-condensing environment is required. The PS100 includes built-in keyhole flanges for mounting to the backplate of a Campbell Scientific enclosure.


The PS100 is compatible with the A100 null-modem adapter and the A105 adapter for additional 12 V output terminals. The A100 Null Modem Adapter connects and powers two Campbell Scientific peripherals via two CS I/O 9-pin connectors configured as a null modem. This is useful in linking different communications technologies, such as telephone to radio, at sites that do not have a data logger. The A105 adapter may be used to provide additional 12 V and ground terminals where the power supply is used to power several devices.

Charging Source

The PS100 charges with a 24 V input. However, when the battery is discharged or the system is pulling high current (about 700 mA), the regulator overheats. This, in turn, limits the charging time because the regulator is heating up until it gets so hot that it shuts down. At this point, the regulator stops charging the battery until the regulator cools down and starts charging again. This cycle repeats until the battery is charged enough so that the regulator no longer overheats. For a system with a constant current drain of 0.7 A or higher, the PS100 is not able to keep the battery charged unless the input voltage is between 16 and 20 V. If the input voltage is between 16 and 20 V, the regulator outputs continuously up to a 1.2 A load.

Videos & Tutorials

Frequently Asked Questions

Number of FAQs related to PS100: 28

Expand AllCollapse All

  1. The PS100 is designed to follow the Yuasa recommended temperature curve for float-charging batteries. This gives a nominal charge voltage of approximately  13.7 V at 25°C. The design should follow the curve to within ±0.2°C or better.

  2. Yes. However, if this type of data is desired, a better option may be to use a PS200 instead of a PS100. The PS200 (or CH200) model has built-in sensors that can measure the flux into and out of the battery and then pass that information to the data logger via an SDI-12 cable.

  3. Connecting a 55 W solar panel to a PS100 will not damage the PS100. However, the current passing from the solar panel to the battery is limited to a maximum of approximately 1.2 A. Therefore, the full benefit of the 55 W solar panel is not realized. A better option may be to use a 55 W solar panel with a PS200 or CH200.

  4. The LED will be off if the solar panel is missing or damaged, or if it is night-time. If the charging source is a wall charger, such as a 29796, the issue could be a loose connection, a power failure, or a bad wall transformer. To check the connection, try tightening the screws. To check for a power failure, try plugging another device into the wall outlet.

  5. The external battery can be as large as the BP84; however, there is still a limitation of a 1.2 A charging current, as well as other specifications of the PS100. If higher charging currents are needed, use the PS200, Smart Power Supply and Charge Controller, or pn 18529, 10A, 12 V, Morningstar Regulator.

  6. Campbell Scientific recommends letting an idle PS100 charge continuously in an ac power setting. If solar panel power is being used, the daily cycle is expected.

  7. Yes. The 7 Ah battery can be purchased locally to save on shipping costs. Purchase pn 17057PS100 Power Supply with No Battery.

  8. Although the SP20 delivers approximately 1.17 A in full sun, the limit of the PS100 is approximately 1.2 A. Therefore, Campbell Scientific does not recommend connecting a PS100 to a solar panel larger than 20 W. In comparison, the PS200 and CH200 can be connected to solar panels as large as 70 to 90 W.

  9. Yes, but the heat sink on the PS100 may get warm, so be careful. An older Campbell Scientific charger that is 15 to 18 Vac or Vdc may run cooler. To charge from a 24 Vdc power source, Campbell Scientific recommends using the PS150, CH150, PS200, CH200 or CH201.

    The 29796 or 22110 can be used with the PS100 if it limited to an "average current of no more than 0.25 A." Short-term peak currents can exceed 1 A without problem. 

Case Studies

Texas: Water Conservation
The city of Frisco, Texas, sits in an area that experienced severe drought from more
South Korea: Damage from Freezing Roads
Korea Expressway Corporation (KEC) was established in 1969 to construct and manage expressways throughout more
District of Columbia: Solar Decathlon
The Solar Decathlon takes place every other year on the National Mall in Washington, more
New Hampshire: Mount Washington Observatory
The Mount Washington Observatory in New Hampshire is one of the oldest weather observatories more

Privacy Policy Update

We've updated our privacy policy.  Learn More