Instrument Expert
Original factory packaging
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Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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S2-141-SS Product Manual Specification Sheet
This promotional package includes both an S2-141 PAR-FAR sensor with a 30 cm cable and microCache Bluetooth micro-logger at a special introductory price. When paired, these two devices are a powerful tool for monitoring photosynthetically active radiation with research-grade accuracy for optimal plant growth. The S2-141-SS PAR-FAR sensor is a unique two-channel sensor for measuring both the PAR (PPFD) and Far-red outputs of electric grow lights.
The new AT-100 microCache (μCache) micro-logger is a rugged, standalone, battery-powered device that can collect over 400,000 data points and connects your sensor to your iOS or Android device via Bluetooth using our free ApogeeConnect app. The app allows you to make real-time measurements, set custom datalogging intervals, monitor and graph daily lights integrals, assure photoperiods, download datasets, and more.
| Power Supply | Self-powered |
| Output (sensitivity) | 0.01 mV per μmol m?2 s?1 (PAR); 0.03 mV per μmol m?2 s?1 (Far-Red) |
| Calibration Factor (reciprocal of sensitivity) | 100 μmol m?2 s?1 per mV (PAR); 38 μmol m?2 s?1 per mV (Far-Red) |
| Calibration Uncertainty | ± 5 % |
| Output Range | 0 to 40 mV (PAR); 0 to 20 mV (Far-Red) |
| Measurement Repeatability | Less than 1 % |
| Long-term Drift | Less than 2 % per year |
| Non-linearity | Less than 1 % (up to 4000 μmol m?2 s?1) (PAR); Less than 1 % (up to 1000 μmol m?2 s?1) (Far-Red) |
| Response Time | Less than 1 ms |
| Field of View | 180? |
| Spectral Ranges | 389 to 692 nm ± 5 nm (PAR); 700 to 750 nm ± 5 (Far-Red) |
| Directional (Cosine) Response | ± 2 % at 45?; ± 5 % at 75? zenith angle |
| Temperature Response | Less than 0.1 % per C |
| Housing | Anodized aluminum body with acrylic diffuser |
| IP Rating | IP68 |
| Operating Environment | -40 to 70 C; 0 to 100 % relative humidity |
| Dimensions | 30.5 mm diameter, 37 mm height |
| Communication Protocol | Bluetooth® Low Energy (Bluetooth 4.0+) |
| Bluetooth Range | ~45 m (line-of-sight) |
| Data Logging Capability | Averaging Interval: 1-60 minutes; Sampling Interval: ≥ 1 second |
| Data Log Capacity | Over 400,000 Entries (~9 months at a 1-minute logging interval) |
| Time Accuracy | ± 30 seconds per month at 0° C ~ 70° C |
| Battery Type | 2/3 AA 3.6 Volt Lithium Battery |
| Battery Life | ~1 year w/ 10-second sampling interval and an average of 5 minutes daily connected time; ~2 years w/ 60-second sampling interval and an average of 5 minutes daily connected time |
| Operating Environment | -40 to 85 C |
| Dimensions | 66 mm length, 50 mm width, 18 mm height |
| Weight | 52 g |
| IP Rating | IP67 |
| Connector Type | M8 |
| Bluetooth Module | BMD-340 Contains FCC ID: 2AA9B10 IC: 12208A-10 |
| ADC Resolution | 24 bits |
| Warranty | 4 years against defects in materials and workmanship |
| Manufactured | Made in the USA |
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