Sensing Element
1.8K Thermistor
Sensor Body
Heat conductive plastic, 0.875"
Lead Length
18 in (0.46 m) Plenum-Rated
Enclosure
None — Bare Leads
Accuracy
±0.36°F (±0.2°C)
Probe Range
-40° to 221°F (-40° to 105°C)
The BAPI BA/1.8K-PP-18" is a single-point remote sensor built around a heat conductive plastic cup 0.875 in long on a 0.175 in diameter shell and a passive 1.8K Thermistor. It ships with 18 in (0.46 m) of plenum-rated cable, bare for direct field termination.
Remote sensors are built for tight spots — inside electronic circuit enclosures, retrofitted into existing pneumatic thermostats, or dropped into a junction box behind a wall plate. The element is passive and has no polarity, so both leads land directly on any controller analog input configured for the 1.8K Thermistor curve.
Specifications
| Sensing Element | 1.8K Thermistor, NTC, 2-wire passive |
| Output | Resistance (non-linear) |
| Accuracy | ±0.36°F (±0.2°C) standard |
| Stability | < 0.036°F/year (< 0.02°C/year) |
| Heat Dissipation | 2.7 mW/°C |
| Temp. Drift | < 0.02°C per year |
| Probe Range | -40° to 221°F (-40° to 105°C) |
| Probe / Body | Heat conductive plastic cup, 0.875 in (22.2 mm) long, 0.175 in (4.45 mm) dia. |
| Lead Length | 18 in (0.46 m) |
| Wire Insulation | Plenum-rated cable |
| Lead Wire | 22 AWG stranded |
| Enclosure | None — bare leads for field termination |
| Operating Range | Units with plenum-rated wire: -4° to 167°F (-20° to 75°C), 0-100% RH non-condensing |
| Agency | RoHS, CE (passive thermistors 20KΩ and smaller), PT = DIN43760 | IEC Pub 751-1983 | JIS C1604-1989 |
Installation Notes
- Wire with twisted pair, 22 AWG minimum, using sealant-filled connectors. Heavier gauge may be needed on long runs.
- Do not share conduit with high or low voltage AC power wiring — BAPI testing shows signal error when AC runs alongside sensor leads.
- Two-wire passive element, no polarity. Land both leads on the controller analog input.
- Fits inside a standard junction box behind a wall plate cover, or retrofits into the body of an existing pneumatic thermostat.
Documentation
Product Datasheet (PDF) · Installation & Operation (PDF) · Enclosure Dimensions (PDF)
Warranty & Sourcing
ZOT Supply is an authorized distributor for Building Automation Products, Inc. (BAPI). This product carries the full BAPI factory warranty.
ZOT Supply is an authorized distributor for Building Automation Products, Inc. (BAPI). This product carries the full BAPI factory warranty.
- Product Family:
- Remote Sensor
- Signal Type:
- Passive Resistive
- Sensing Element:
- 1.8K Thermistor
- Cable Type:
- Plenum-Rated
- Lead Length:
- 18 in
- Enclosure:
- None (Bare Leads)
- Enclosure Rating:
- Not Applicable
- Probe Material:
- Heat Conductive Plastic
- Termination Option:
- Standard (Flying Leads)
- Mounting Style:
- Enclosure / Thermostat Retrofit
