Stevens Data Loggers and Acquisition Instruments
Stevens designs, manufactures and supports a wide range of data logging, acquisition and control (SCADA) instruments for our customers’ unique needs in intensive environmental monitoring and data collection applications. Stevens’ data loggers are designed for simplicity, scalability and durability for single locations or fully integrated networks containing multiple sites.
Please see the following chart for a comparison of the different data loggers that Stevens manufactures and sells. Click on a picture for more detailed information about a particular data logger.
| SPECIFICATIONS | DataLogic 3000 | AxSys | CCR | DOT LOGGER | VX1100 | VX1004 |
 |
 |
 |
 |
 |
 |
|
| Analog
- Single Ended Input |
8* | 2 | 2 | 4 | 16 | 6 |
| Analog
- Differential Ended Input |
5* | 0 | 0 | 0 | 8 | 0 |
| Analog
Voltage Input Range |
4 to 20 mA, 0 to 5 VDC | 4 to 20 mA | 4 to 20 mA | 4 to 20 mA | ±10V, ±5V, ±2.5V, ±250mV, ±25mV |
0 to 5 volts |
| Differential Isolated Inputs | 1 - 22 bit | n/a | n/a | n/a | n/a | n/a |
| SDI-12 | 12* | 8 | 8 | 191 | 10 | 10 |
| RS-232 Independent Serial Ports |
4* | 1 | 1 | 1 | 1 | 1 |
| RS-485 Serial Ports |
1* | 0 | 0 | 0 | 0 | 0 |
| Can Bus | OPTIONAL | NO | NO | NO | NO | NO |
| Quadrature Input | 1* | 1 | 1 | 0 | 0 | 0 |
| Pulse Channels | 1* | 1 | 1 | 4 | 1 | 1 |
| USB 2.0 Input/Output | YES | NO | NO | NO | NO | NO |
| NTSC & PAL Camera/Video Input |
OPTIONAL | NO | NO | NO | NO | NO |
| 10 Base-T Ethernet Port |
OPTIONAL | NO | NO | NO | NO | NO |
| Sensor Power | 24 VDC, 12 VDC, 5 VDC | 12 VDC, 5 VDC | 12 VDC, 5 VDC | 24 VDC | 12 VDC, 5 VDC | 12 VDC, 5 VDC |
| Processor | 32-bit ARM and dsPIC/PIC32 | 8-bit | 8-bit | 12-bit | 12-bit | 12-bit |
| Logging Interval | 1 minute to 24 hours | 1 second to 24 hours | 1 minute to 24 hours | 1 minute to 24 hours | 1 minute to 24 hours | 1 minute to 24 hours |
| Analog to Digital (A/D) Bits | 12 | 12 | 12 | 12 | NO | NO |
| Control Outputs | 0 | 2 | 2 | 0 | 4 | 4 |
| Switch Excitation Voltage | 5V, 12V and/or 24V | YES | YES | 5 - 12 VDC | YES | YES |
| Data Memory Storage |
2 Gigabytes internal memory, with SD card storage expandable up to 8 Gigabytes | 128 kbytes | 128 kbytes | 128 kbytes | 128 kbytes | 128 kbytes |
| Temperature Range | -40 C to +70 C |
-40 C to +70 C |
-40 C to +50 C |
-40 C to +70 C |
-40 C to +60 C |
-40 C to +60 C |
| MODBUS Protocol | OPTIONAL | NO | NO | OPTIONAL | NO | NO |
| VDC Power Requirements | 8.6 - 16 | 10 - 17 | 10 - 17 | 10 - 17 | 9 - 16 | 8 - 16 |
| Standby Current | <4 mA | 1.0 mA | 150 mA | 0.5 mA | 0.5 mA | 0.5 mA |
| Keypad | OPTIONAL FULL-COLOR LCD TOUCH SCREEN |
YES | YES | NO | YES | YES |
| Display | OPTIONAL FULL-COLOR LCD TOUCH SCREEN |
YES | YES | NO | YES | YES |
| Enclosure | Anodized Aluminum | NEMA-4 | NEMA-4 | Anodized Aluminum | Anodized Aluminum | Anodized Aluminum |
| Data Card Slot | SD (SECURE DIGITAL) UP TO 8 GIGABYES STORAGE |
PCMCIA 256 kbytes |
PCMCIA 256 kbytes |
NO | OPTIONAL | NO |
| Real Time Clock (min/month) | ±1 LEAP YEAR AND TEMP. CORRECTED |
±3 | ±3 | ±1 | ±1 | ±1 |
| Size (W x H x D) inches | 6.5 x 4.5 x 2.3 | 6.7 x 5.3 x 5.2 | 13.5 x 14.9 x 9.3 | 6.5 x 3 x 2.5 | 12 x 6.5 x 3.75 | 12.3 x 3.2 x 3.0 |
| Size (W x H x D) mm | 165 x 114 x 58 |
170 x 134 x 130 |
344 x 380 x 235 | 165 x 76 x 63 | 305 x 165 x 95 | 312 x 80 x 76 |
| *Expansion options available |