| Technical Specification |
ALTA® Wireless Humidity Sensors |
| Humidity Measurement |
|
| Range |
0 to 100% RH (non-condensing) |
| Accuracy |
± 2% RH (0 to 80%), ± 3% RH (80% to 100%)¹ |
| Resolution |
0.01 %RH |
| Response Time - Leaded Sensor |
40 seconds (8-second time constant)² |
| Response Time - Non-Leaded Sensor |
6+ hours (75-minute time constant)² |
| Temperature Measurement |
|
| Range - Leaded Sensor |
-25°C to 70°C (-13°F to 158°F)³ |
| Range - Non-Leaded Sensor |
|
| - ALTA Commercial |
10°C to 50°C (50°F to 122°F) |
| - ALTA Enterprise |
-18°C to 55°C (0°F to 130°F) using alkaline batteries |
| - ALTA Industrial |
-40°C to 70°C (-40°F to 158°F) |
| Accuracy |
± 0.3°C (0.54°F) Typical¹ |
| Resolution |
0.01°C (0.018°F rounded to 0.01 decimal place) |
| Response Time - Leaded Sensor |
15 seconds (3-second time constant)² |
| Response Time - Non-Leaded Sensor |
100 minutes (20-minute time constant)² |
| Leaded Probe |
|
| Tip Dimensions |
11 mm Wide x 4.5 mm Tall (0.44" Wide x 0.16" Tall) |
| Tip Construction |
PCA with high-accuracy digital temp/humidity sensing element, soldered interface wires, waterproof heat shrink with air hole |
| Wire Details |
4-conductor, 26 AWG, stranded copper |
| Insulation |
PVC, 0.010" |
| Shield |
No |
| Jacket |
PVC (black) |
| Overall Diameter |
4.25 ± 0.2 mm (0.17" ± 0.007") |
| Ratings / Approvals |
UL AWM STYLE 2464, cUL AWM I/II A 80°C 300V FT1 LF |
| Temperature Rating |
-25°C to 80°C (-13°F to 176°F) |
| Voltage Rating |
300 V Max |
| Dielectric Strength |
1500 V RMS |
| Cable Length |
Standard: 0.9 m (3 ft); Optional: 0.1, 3, 7.5 m (0.33, 10, 25 ft) |
| ALTA Wireless |
|
| Data Logging |
Sensor logs 2,000 to 4,000 readings if gateway connection is lost (non-volatile flash, persists through power cycling): |
| |
10-minute Heartbeats = ~22 days; 2-hour Heartbeats = ~266 days |
| Wireless Protocol |
ALTA Proprietary Frequency-Hopping Spread Spectrum (FHSS) |
| Wireless Transmission Power (EIRP) |
50 mW (900 MHz), 25 mW (868 MHz), 10 mW (433 MHz) |
| Wireless Range |
2,000+ ft. through 18+ walls with the ALTA XL® Gateway |
| Security |
Encrypt-RF® (256-bit key exchange and AES-128 CTR) |
| General |
|
| Battery Voltage Range |
2.0 to 3.8 VDC |
| Operating Altitude |
-15.2 to 1,982 m (-50 to 6,500 ft)⁴ |
| Storage Altitude |
-15.2 to 3,048 m (-50 to 10,000 ft)⁴ |
| Operating Humidity |
5 to 85% RH (non-condensing) |
| Certifications |
900 MHz sensors: FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1. |
| |
868 and 433 MHz sensors tested and comply with EN 55032:2015/A11:2020, EN 55035:2017/A11:2020, ETSI EN 300 220 V3.2.1 (2018-06), |
| |
ETSI EN 301 489-3 V2.2.0 (2021-11), and ETSI EN 303 645. |
| |
All sensors comply with EN 61010-1, EN 60950, and meet RoHS 2015/863 and REACH 224 (June 2022) according to IEC 63000:2016/AMD1:2022. |
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