Using state-of-the-art laser technology, the Lighthouse REMOTE 1104LD is an industry first – a laser diode based remote particle counter with a sensitivity of 0.10 micron and a high flow rate of 1.0 CFM (28.3 LPM).


     Designed with reliability and quality in mind, the REMOTE 1104LD features our long-life laser diode technology that provides higher concentration limits, a better signal to noise ratio and requires less routine maintenance than conventional HeNe laser-based particle counters.


     The REMOTE 1104LD supplies continuous real time data at a cost-effective price per point. Very simple to integrate with large facility monitoring and management systems, the REMOTE 1104 can transfer up to 8 channels of simultaneous particle count data via RS-485 MODBUS.


Designed and built by Lighthouse, a name you can trust.



  • 0.10 - 1.0 μm Sensitivity
  • 1.0 CFM (28.3 LPM) Flow Rate
  • Up to 8 Channels of Simultaneous Data
  • World’s Smallest 1.0 CFM 0.10 µm counter
  • Meets ISO 21501-4 Standards
  • Long Life Laser Diode
  • Small Footprint
  • Status Indicators
  • RS-485 MODBUS
  • Stainless Steel Enclosure
  • Interfaces to Facility Monitoring Systems
  • Uses External Vacuum Source
  • Designed for Reliability
  • Designed to Ensure 21 CFR Part 11 Compliance when used with Additional Software
  • No Routine Laser Tube Replacements
  • No Routine Laser Optics Cleaning


  • 2 Year Warranty
  • Cost Effective Price per Point
  • Proven Data Integrity
  • Provides Continuous Real-Time Data
  • Reduced Maintenance costs over HeNe
  • Easy Systems Integration
  • International Support
  • Low Cost of Ownership


Size Range: 0.10 - 1.0 μm
Channel Sizes:

Standard: 0.10, 0.15, 0.2, 0.25, 0.3, 0.5, 0.7, 1.0 μm

Communication Modes: RS 485 MODBUS
Counting Effi ciency: 50% @ 0.1 μm; 100% for particles > 0.15 μm (per JIS)
Flow Rate: 1.0 CFM (28.3 LPM)
Laser Source: Long Life Laser Diode
Zero Count Level:  
Concentration Limits: 500,000 Particles / ft3 (17,150,000 / m3) @ 5% Coincidence Loss, per ISO 21501-4
Calibration: NIST Traceable, per ISO 21501-4
Vacuum Requirements: External Vacuum required, nominal 1.0 CFM >18" (45.72 cm) of Hg
LED Indicators: Power, Flow, Service, Sampling
Supporting Software: Lighthouse Monitoring System, LMS Express, LMS Express RT, LMS Express RT Plus
Enclosure: Stainless steel
Power: 24 VDC
Dimensions: 10.5” (w) x 7.65” (h) x 3.35” (d) [26.67 x 19.43 x 8.51 cm]
Weight: 7.0 lb (3.18 kg)

Environmental Conditions

Operating: 50°F to 104°F (10°C to 40°C) / 20% to 95% non-condensing
Storage: 14°F to 122°F (-10°C to 50°C) / Up to 98% non-condensing


Included: Operating Manual on CD, Purge Filter, Power Supply, Power Cord
Optional: Isokinetic Sampling Probe, Sample Tubing, Cabling