Technical specifications
Table 1: HT-69020NP-0, HT-69030NP-0 Duct Probe RH Transmitter technical specifications
Specification Description
Sensor type Thermoset polymer based capacitive
Accuracy ±2% RH, 3% RH, or 5% RH from 5% RH to 95% RH
Measurement range 0% RH to 100% RH, noncondensing
Resolution ±0.01% RH
Hysteresis ±0.8% RH @ 25°C (77°F)
Response time 8 s
Stability <0.25% RH/year
Power supply 24 VAC/DC ±10%; 28 VAC/DC maximum
Consumption at 24 VDC 22 mA maximum
Input voltage effect Negligible over specified operating range
Output signal 4 mA to 20 mA current loop, 0 VDC to 5 VDC, or 0 VDC to 10 VDC, switch-
selectable
Output drive at 24 VDC Current: 550 ohm maximum
Voltage: 10K ohm minimum
Internal adjustments ZERO and SPAN pot
Protection circuitry Reverse voltage-protected and output limited
Ambient operating range -40°F (-40°C) to 122°F (50°C)
Operating humidity 5% RH to 95% RH, noncondensing
Storage temperature -22°F (-30°C) to 158°F (70°C)
Enclosure ABS, UL94-V0, IP65 (NEMA 4X)
Dimensions (H x W x D) 3.00 in. x 3.24 in. x 2.05 in. (76.2 mm x 82.5 mm x 52.0 mm)
Probe (L x D) 9 in. x 0.5 in. (230 mm x 12.7 mm), 304 S/S with porous filter
Wiring connections Screw terminal block, 14 AWG to 22 AWG
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions
beyond these specifications, consult the local Johnson Controls office. Johnson Controls shall not be liable for damages
resulting from misapplication or misuse of its products.
HT-69020NP-0, HT-69030NP-0 Duct Probe RH Transmitter Installation Guide4
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