The BAPI BA/1.8K-PP-25'-BB2 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 25 ft (7.6 m) of plenum-rated cable, factory-terminated into a BAPI-Box 2 (BB2) enclosure.
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. The BAPI-Box 2 (BB2) gives you a rated termination point right at the mounting surface instead of a splice above the ceiling.
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 | 25 ft (7.6 m) |
| Wire Insulation | Plenum-rated cable |
| Lead Wire | 22 AWG stranded |
| Enclosure | BAPI-Box 2 (BB2) |
| Enclosure Rating | IP66, NEMA 4 |
| Enclosure Material | UV-resistant polycarbonate, UL94 V-0 |
| Enclosure Dimensions | 4.9 × 2.8 × 2.4 in (125 × 72 × 60 mm) |
| Conduit Entries | Three 1/2 in NPSM entries and three 1/2 in drill-outs |
| Wall Gasket | 0.25 in (6.35 mm) closed cell foam, mold impervious |
| Enclosure Ambient | -40° to 185°F (-40° to 85°C) |
| 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.
- Mount the enclosure with #8 screws through at least two opposing tabs; a 1/8 in pilot hole makes this easier.
- Use caulk or Teflon tape on conduit entries, and bring conduit in from the bottom for outdoor or wet locations.
Documentation
Product Datasheet (PDF) · Installation & Operation (PDF) · Enclosure Dimensions (PDF)
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:
- 25 ft
- Enclosure:
- BAPI-Box 2 (BB2)
- Enclosure Rating:
- IP66, NEMA 4
- Probe Material:
- Heat Conductive Plastic
- Termination Option:
- Standard (Flying Leads)
- Mounting Style:
- Enclosure / Thermostat Retrofit
