
Direct Connect Sensors
LEL 0–100% | O2 0–25% Vol | H2S 0–100 ppm | CO 0–300 ppm | Class I Div. 1 Groups B,C,D | –40°C to 75°C
Air monitoring from RKI, Dräger and Ion Science: personal and multi-gas portable detectors, fixed transmitters and controllers, VOC, benzene, formaldehyde, arsine and SF6 monitors, passive chemical badges, docking and bump stations, and calibration gas.

LEL 0–100% | O2 0–25% Vol | H2S 0–100 ppm | CO 0–300 ppm | Class I Div. 1 Groups B,C,D | –40°C to 75°C

4-20 mA output | 15–27 VDC (2-wire loop-powered) | 0–40°C operating | ExiaIICT4 intrinsically safe | 3.9"W × 9.5"H × 1.9"D

CO detection | 0–150 ppm, 1 ppm resolution | Alarms: 50 ppm (L1), 100 ppm (L2) | Electrochemical sensor, field-replaceable | Power: 115 VAC / 24 VDC / 2×AA batteries

24 VDC (11–30 V) | 4–20 mA output | CO: 0–300 ppm / H2S: 0–100 ppm | Electrochemical sensor | 0–120°F operating range

0–100% LEL | 24 VDC input | Sample draw up to 100 ft | 7×7×6.13 in (cast aluminum) | Class I Div I Groups B/C/D (CSA/UL)
4-channel gas monitoring | NEMA 4X enclosure | 115/220 VAC or 24 VDC | RS-485 Modbus + 4-20 mA outputs | -40°C to 50°C operating range

24 VDC nominal (18.5–30 VDC) | NEMA 4X polycarbonate enclosure | Internal pump, 100 ft sample range | LEL / O2 / H2S / CO / CO2 / H2 sensor options | Optional 4-20 mA output | -20 to 50°C operating range

DC 24V ±10%, max 4W | 4-20mA / PoE / LonWorks output | Sample draw 0.5 L/min ±10% | 2.8"W × 4.7"H × 5.9"D, 0.9 kg | Operating: 0–40°C, 30–70% RH

Sample draw up to 100 ft (1/4\" OD tube) | Compressed air: 10–140 PSI | Sample flow: 3 SCFH (1.5 LPM) | Enclosure: IP65 / NEMA 4X (SS or GRP) | Outputs: 4–20 mA, RS485 Modbus

NEMA 4X enclosure | Up to 4 sensors: CH4 0–100% vol, CO2 0–50% vol, O2 0–25% vol, H2S 0–1000 ppm | 100 ft sample range | 4-20 mA + Modbus RTU output | 24"H x 24"W x 10"D

NIC Detection | 0–2000 ppm SF6 | 100–240 VAC 50/60 Hz | IP52 | -5°C to 45°C operating
8 channels | NEMA 4X weatherproof enclosure | 85-264 VAC / 24 VDC | 4-20 mA inputs (2- or 3-wire) | -10°C to 50°C operating range
2-Channel | NEMA 4X Enclosure | 110–240 VAC or 24 VDC | 4-20 mA Output per Channel | 10 A Relays (SPDT)

NEMA 4X enclosure | 115/220 VAC or 24 VDC | -20°C to 50°C operating | 10 A SPDT relays (3 total) | 4-20 mA input/output

4–20 mA output | Class I Div. 1 Groups B, C & D | –40°C to 75°C | LEL / O2 / H2S / CO / CO2 / toxic gases | UL & CSA certified

MOS sensor | 2 alarm levels (12A relay each) | 115 VAC / 24 VDC / 48 VDC | 35–120°F (2–49°C) | 0–100% RH

12 VDC input (100–240 VAC AC adapter) | Operating -10°C to 40°C, ≤80% RH | Compatible: RKI 03 Series gas monitors | Max 200 records standalone / unlimited with PC | Up to 10 modules via USB (PC-controlled mode)

No power required | Compatible: X-am 1700/2000/2500/5000/5600 | Flow rate: 0.5 Lpm | Cylinders: 34/58/103 L | Weight: 5 lbs

58 L aluminum (Portagreen) cylinder | 500 PSIG | C-10 outlet (5/8"-18 UNF) | 3.5" dia × 14.5" H | NIST traceable, ISO 9001:2015

17–550 L non-refillable steel cylinders | 240–2200 PSIG | CGA 600 / C-10 5/8"-18 UNF / CGA 165 outlets | DOT 39 NRC | ISO 9001:2015 + NIST-traceable

NLB-8C10: 0.1–3.0 LPM demand flow | NLB-517: 0.5 LPM preset flow | Inlet: C-10 (5/8"-18 UNF) | Max inlet: 1000 PSIG | Temp: 0–140°F

CGA 600 inlet | 3/16" hose barb outlet | 500 PSIG max inlet pressure | 0.25–1.5 LPM fixed flow (400 series) | 0–140°F operating range
Hard plastic construction | 500A: 4×17/34L cylinders | 500B: 1×58/103L + 2×17/34L | 500C: 3×58/103L cylinders | 500D: 2×17/34L cylinders