Capacitive dew-point transmitter HCA100 series

G 1/22-wire4-20 mA

Short description
A reliable stainless-steel probe for dew point (HCA100D) and relative humidity (HCA100R) measurement with 4–20 mA loop output and IP65 protection, suitable for compressed air and HVAC monitoring.

HCA100D

• Dew point range: -50 °C to +95 °C
• Optional ½" compression fitting
• Calibration points: -40 °C, +10 °C
• Pressure rating: up to 200 PSI (≈10 bar)
• Operating temperature: up to 105 °C
• Material: 304 stainless steel
• Sintered stainless-steel filter top — removable and washable
• Probe dimensions: length 6.5 in (16.51 cm), O.D. 0.5 in (1.27 cm)
• Output: single 4–20 mA, 2-wire loop powered
• Scaled range: -50 °C to +50 °C (other ranges available)
• Resolution: 0.05 °C
• Accuracy: ±1.0 °C (-40 °C to -20 °C); ±3.0 °C below -20 °C
• Standard cable length: 6 ft (custom lengths available)
• NIST calibration available

HCA100R

• Designed for HVAC humidity monitoring
• Relative humidity: 0–100% (non-condensing/non-steam)
• Operating temperature: up to 105 °C
• Material: 304 stainless steel
• Sintered stainless-steel filter top — removable and washable
• Probe dimensions: length 6.5 in (16.51 cm), O.D. 0.5 in (1.27 cm)
• Output: single 4–20 mA, 2-wire loop powered (probe only)
• Scaled range: 0–100% RH
• Accuracy: ±1% RH
• Standard cable length: 6 ft (custom lengths available)
• NIST calibration available

Product overview (table values)
Parameters: Dew point °C / Moisture %
Method: Capacitive
Range: -50 °C – +90 °C DP; 0 – 100% rH
ATEX: No
SIL: No
Accuracy: ±1% FSD
Resolution: analog according to range
Flow rate: 2–5 l/min
Pressure: up to 10 bar
Calibration: dew point mirror / NIST
Response time T90: not specified
Gas temperature: up to 100 °C
Output: 4–20 mA, 2-wire
Supply voltage: 12–28 V DC
Display: none
Protection class: IP65
Connection: ½"
Dimensions: 6 in probe (≈16.5 cm)
Weight: ≈0.3 kg

Technical specifications

• Models: HCA100D (dew point) and HCA100R (relative humidity)
• Measured parameters: dew point (°C) and relative humidity (% rH)
• Sensing method: capacitive
• Dew point range: -50 °C to +90 °C DP
• Relative humidity range: 0–100% rH
• Typical accuracy: ±1% FSD; HCA100D: ±1.0 °C (-40 °C to -20 °C), ±3.0 °C below -20 °C
• Resolution: 0.05 °C (HCA100D); analog resolution per range
• Output signal: 4–20 mA, 2-wire loop powered
• Supply voltage: 12–28 V DC
• Operating temperature (probe): up to 105 °C
• Gas temperature spec: up to 100 °C
• Pressure capability: up to 10 bar (200 PSI)
• Recommended flow rate: 2–5 l/min
• Connection: ½"
• Ingress protection: IP65
• Material: 304 stainless steel
• Filter: sintered stainless steel, removable and washable
• Probe dimensions: length ~6–6.5 in (≈16.5 cm), O.D. ~0.5 in (≈1.27 cm)
• Weight: ~0.3 kg
• Cable: standard 6 ft (≈1.83 m), custom lengths available
• Calibration: dew point mirror; NIST calibration available
• Typical applications: compressed air monitoring (HCA100D), HVAC humidity control (HCA100R)