HM-FP4 Flame Photometer

Product Introduction

The HM-FP4 Flame Photometer is a four-channel atomic emission spectrometer built by HM Instruments for simultaneous determination of potassium, sodium, lithium, and calcium in liquid samples. Using interference filter spectral separation combined with a silicon photocell detector, the instrument reads each element's characteristic emission line independently and displays results as direct concentration values. A 7-inch color capacitive touch LCD provides an intuitive operating interface, while a built-in thermal printer delivers instant hard-copy records of every measurement.

Designed for upper mid-range analytical laboratories, the HM-FP4 allows any combination of three elements to be measured simultaneously from a single aspiration, dramatically improving throughput compared to sequential single-element methods. The self-developed high-performance nebulizer ensures consistent sample uptake below 6 mL/min, and one-touch ignition with a built-in air pump simplifies daily startup. Calibration curves of up to 10 points per element can be stored for 20 different methods, supporting segmented fitting, linear fitting, and curve fitting modes. Historical records are exportable via USB drive, and the instrument meets JJG630-2007 verification requirements. Learn more about our HM-FP4 flame photometer solutions for laboratory applications.

Applications

• Soil fertility analysis — extractable K, Na, Li, Ca in agricultural topsoil and subsoil layers
• Geological survey — alkali metal content in rock, mineral, and sediment samples
• Plant tissue testing — potassium and calcium nutrition in leaf, grain, and fruit samples
• Clinical and biomedical laboratories — serum and urine electrolyte profiling (Na, K, Ca, Li)
• Environmental water monitoring — dissolved alkali metals in surface water, groundwater, and wastewater
• Fertilizer quality control — potassium and sodium content in compound and organic fertilizers
• Food and beverage testing — mineral element content in dairy products, beverages, and processed foods

Functional Performance

1. 7-inch color capacitive touch LCD delivers a compact, stable, and reliable user interface with clear menu navigation
2. Direct concentration reading for K, Na, Li, Ca — any three-element combination can be measured simultaneously in one aspiration
3. High-transmittance, ultra-low stray-light interference filters provide excellent spectral resolution for each element channel
4. One-touch ignition with built-in air pump eliminates external compressor dependency and simplifies bench setup
5. Self-developed high-performance nebulizer ensures stable aspiration rate below 6 mL/min with minimal sample waste
6. Up to 10-point calibration curves per element, 20 curves stored, supporting segmented, linear, and curve fitting methods
7. Moisture separator protects optical and electronic components from humidity-induced drift during extended runs
8. Flame-out protection with automatic gas valve shutoff enhances laboratory safety during unattended operation
9. Single-point calibration corrects baseline drift without re-running the full standard curve, saving time between batches
10. Historical record printing via built-in thermal printer and USB drive export for complete data traceability

Main Parameters

Parameter	Value
Product Model	HM-FP4
Test Elements	Na, K, Li, Ca (4 channels)
Operation Method	7-inch color capacitive touch LCD
Spectral Method	Interference filter
Photoelectric Element	Silicon photocell
Concentration Calculation	Segmented method, linear fitting, curve fitting
Calibration Curve Storage	Up to 10 points per curve, 20 curves total
Stability	≤3% (15s), ≤8% (6 measurements)
Repeatability	≤2%
Response Time	<8s
Sample Aspiration Rate	<6 mL/min
Filter Bandwidth	<15 nm
Linear Error (Na)	<0.03 mmol/L
Linear Error (K)	<0.005 mmol/L
Linear Error (Li)	<0.021 mmol/L
Linear Error (Ca)	<0.075 mmol/L
Detection Limit (Na)	<0.008 mmol/L
Detection Limit (K)	<0.004 mmol/L
Detection Limit (Li)	<0.015 mmol/L
Detection Limit (Ca)	<0.050 mmol/L
Print	Built-in thermal printer
USB Output	Historical records exportable via USB drive
Power	220V±22V, 50Hz±1Hz, ≤50W
Dimensions	460 mm × 325 mm × 450 mm
Weight	~10 kg

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